MessageBox.Show Method

public:
 static System::Windows::Forms::DialogResult Show(System::String ^ text);

public static System.Windows.Forms.DialogResult Show (string text);

static member Show : string -> System.Windows.Forms.DialogResult

Public Shared Function Show (text As String) As DialogResult

Parameters

Returns

DialogResult

Une des valeurs DialogResult.One of the DialogResult values.

Examples

L’exemple de code suivant affiche une boîte de message simple.The following code example displays a simple message box.

private void DisplayMessageBoxText()
{
         MessageBox.Show("Hello, world.");
}

Private Sub DisplayMessageBoxText()

    MessageBox.Show("Hello, world.")
End Sub

Remarks

Par défaut, la boîte de message affiche un bouton OK .By default, the message box displays an OK button. La boîte de message ne contient pas de légende dans le titre.The message box does not contain a caption in the title.

public:
 static System::Windows::Forms::DialogResult Show(System::Windows::Forms::IWin32Window ^ owner, System::String ^ text, System::String ^ caption, System::Windows::Forms::MessageBoxButtons buttons, System::Windows::Forms::MessageBoxIcon icon, System::Windows::Forms::MessageBoxDefaultButton defaultButton, System::Windows::Forms::MessageBoxOptions options, System::String ^ helpFilePath, System::String ^ keyword);

public static System.Windows.Forms.DialogResult Show (System.Windows.Forms.IWin32Window owner, string text, string caption, System.Windows.Forms.MessageBoxButtons buttons, System.Windows.Forms.MessageBoxIcon icon, System.Windows.Forms.MessageBoxDefaultButton defaultButton, System.Windows.Forms.MessageBoxOptions options, string helpFilePath, string keyword);

static member Show : System.Windows.Forms.IWin32Window * string * string * System.Windows.Forms.MessageBoxButtons * System.Windows.Forms.MessageBoxIcon * System.Windows.Forms.MessageBoxDefaultButton * System.Windows.Forms.MessageBoxOptions * string * string -> System.Windows.Forms.DialogResult

Public Shared Function Show (owner As IWin32Window, text As String, caption As String, buttons As MessageBoxButtons, icon As MessageBoxIcon, defaultButton As MessageBoxDefaultButton, options As MessageBoxOptions, helpFilePath As String, keyword As String) As DialogResult

Parameters

Returns

DialogResult

Une des valeurs DialogResult.One of the DialogResult values.

Exceptions

Examples

L’exemple de code suivant montre comment afficher une boîte de message apparenté à la fenêtre principale.The following code example demonstrates how to show a message box parented to the main window. La boîte de message affiche un bouton aide.The message box displays a Help button. Quand l’utilisateur clique sur le bouton aide, le fichier d’aide Mspaint.chm s’ouvre et la rubrique identifiée par le mot clé mspaint.chm::/paint_brush.htm s’affiche.When the user clicks the Help button, the Mspaint.chm Help file is opened and the topic identified by the mspaint.chm::/paint_brush.htm keyword is displayed. L’exemple requiert l’installation du fichier d’aide Mspaint.chm.The example requires that the Mspaint.chm Help file is installed.

#using <System.dll>
#using <System.Windows.Forms.dll>
#using <System.Drawing.dll>

using namespace System;
using namespace System::Drawing;
using namespace System::ComponentModel;
using namespace System::Windows::Forms;

using System;
using System.Drawing;
using System.ComponentModel;
using System.Windows.Forms;

Imports System.Drawing
Imports System.ComponentModel
Imports System.Windows.Forms

// Display message box parented to the main form. 
// The Help button opens the Mspaint.chm Help file, 
// and the "mspaint.chm::/paint_brush.htm" Help keyword shows the 
// associated topic.
System::Windows::Forms::DialogResult r8 = MessageBox::Show( this, "Message with Help file and keyword.", "Help Caption", MessageBoxButtons::OK, MessageBoxIcon::Question, MessageBoxDefaultButton::Button1, (MessageBoxOptions)0, "mspaint.chm", "mspaint.chm::/paint_brush.htm" );

// Display message box parented to the main form. 
// The Help button opens the Mspaint.chm Help file, 
// and the "mspaint.chm::/paint_brush.htm" Help keyword shows the 
// associated topic.
DialogResult r8 = MessageBox.Show (this, "Message with Help file and keyword.", 
                                   "Help Caption", MessageBoxButtons.OK, 
                                   MessageBoxIcon.Question, 
                                   MessageBoxDefaultButton.Button1, 0, 
                                   "mspaint.chm", 
                                   "mspaint.chm::/paint_brush.htm");

' Display message box parented to the main form. 
' The Help button opens the Mspaint.chm Help file, 
' and the "mspaint.chm::/paint_brush.htm" Help keyword shows the 
' associated topic.
Dim r8 As DialogResult = MessageBox.Show(Me, "Message with Help file and keyword.", _
                                   "Help Caption", MessageBoxButtons.OK, _
                                   MessageBoxIcon.Question, _
                                   MessageBoxDefaultButton.Button1, 0, _
                                   "mspaint.chm", _
                                   "mspaint.chm::/paint_brush.htm")

Remarks

Une boîte de message est une boîte de dialogue modale, ce qui signifie qu’aucune entrée (clavier ou clic de souris) ne peut se produire à l’exception des objets du formulaire modal.A message box is a modal dialog box, which means no input (keyboard or mouse click) can occur except to objects on the modal form. Le programme doit masquer ou fermer un formulaire modal (en général, en réponse à une action de l’utilisateur) avant qu’une entrée dans un autre formulaire puisse se produire.The program must hide or close a modal form (typically in response to some user action) before input to another form can occur. Vous pouvez utiliser le paramètre owner pour spécifier un objet particulier, qui implémente l’interface IWin32Window, qui servira de propriétaire de la boîte de dialogue de niveau supérieur.You can use the owner parameter to specify a particular object, which implements the IWin32Window interface, that will serve as the dialog box's top-level owner.

Quand l’utilisateur clique sur le bouton aide, le fichier d’aide spécifié dans le paramètre helpFilePath s’ouvre et la rubrique de mot clé d’aide identifiée par le paramètre keyword s’affiche.When the user clicks the Help button, the Help file specified in the helpFilePath parameter is opened and the Help keyword topic identified by the keyword parameter is displayed. Le formulaire qui possède la boîte de message (ou le formulaire actif) reçoit également l’événement HelpRequested.The form that owns the message box (or the active form) also receives the HelpRequested event.

See also

• MessageBoxButtons
• MessageBoxIcon
• MessageBoxDefaultButton
• MessageBoxOptions

public:
 static System::Windows::Forms::DialogResult Show(System::String ^ text, System::String ^ caption, System::Windows::Forms::MessageBoxButtons buttons, System::Windows::Forms::MessageBoxIcon icon, System::Windows::Forms::MessageBoxDefaultButton defaultButton, System::Windows::Forms::MessageBoxOptions options, System::String ^ helpFilePath, System::Windows::Forms::HelpNavigator navigator, System::Object ^ param);

public static System.Windows.Forms.DialogResult Show (string text, string caption, System.Windows.Forms.MessageBoxButtons buttons, System.Windows.Forms.MessageBoxIcon icon, System.Windows.Forms.MessageBoxDefaultButton defaultButton, System.Windows.Forms.MessageBoxOptions options, string helpFilePath, System.Windows.Forms.HelpNavigator navigator, object param);

static member Show : string * string * System.Windows.Forms.MessageBoxButtons * System.Windows.Forms.MessageBoxIcon * System.Windows.Forms.MessageBoxDefaultButton * System.Windows.Forms.MessageBoxOptions * string * System.Windows.Forms.HelpNavigator * obj -> System.Windows.Forms.DialogResult

Public Shared Function Show (text As String, caption As String, buttons As MessageBoxButtons, icon As MessageBoxIcon, defaultButton As MessageBoxDefaultButton, options As MessageBoxOptions, helpFilePath As String, navigator As HelpNavigator, param As Object) As DialogResult

Parameters

Returns

DialogResult

Une des valeurs DialogResult.One of the DialogResult values.

Exceptions

Examples

L’exemple de code suivant montre comment afficher une boîte de message avec un bouton d’aide.The following code example demonstrates how to show a message box with a Help button. Quand l’utilisateur clique sur le bouton aide, le fichier d’aide Mspaint.chm s’ouvre et l’onglet Index de l’aide et la rubrique identifiée par le mot clé ovals s’affichent.When the user clicks the Help button, the Mspaint.chm Help file is opened and the Help index tab and the topic identified by the ovals keyword are displayed. L’exemple requiert l’installation du fichier d’aide Mspaint.chm.The example requires that the Mspaint.chm Help file is installed.

#using <System.dll>
#using <System.Windows.Forms.dll>
#using <System.Drawing.dll>

using namespace System;
using namespace System::Drawing;
using namespace System::ComponentModel;
using namespace System::Windows::Forms;

using System;
using System.Drawing;
using System.ComponentModel;
using System.Windows.Forms;

Imports System.Drawing
Imports System.ComponentModel
Imports System.Windows.Forms

// Display a message box. The Help button opens the Mspaint.chm Help file, 
// shows index with the "ovals" keyword selected, and displays the
// associated topic.
System::Windows::Forms::DialogResult r5 = MessageBox::Show( "Message with Help file and Help navigator with additional parameter.", "Help Caption", MessageBoxButtons::OK, MessageBoxIcon::Question, MessageBoxDefaultButton::Button1, (MessageBoxOptions)0, "mspaint.chm", HelpNavigator::KeywordIndex, "ovals" );

// Display a message box. The Help button opens the Mspaint.chm Help file, 
// shows index with the "ovals" keyword selected, and displays the
// associated topic.
DialogResult r5 = MessageBox.Show ("Message with Help file and Help navigator with additional parameter.", 
                                   "Help Caption", MessageBoxButtons.OK, 
                                   MessageBoxIcon.Question, 
                                   MessageBoxDefaultButton.Button1, 
                                   0, "mspaint.chm", 
                                   HelpNavigator.KeywordIndex, "ovals");

' Display a message box. The Help button opens the Mspaint.chm Help file, 
' shows index with the "ovals" keyword selected, and displays the
' associated topic.
Dim r5 As DialogResult = MessageBox.Show("Message with Help file and Help navigator with additional parameter.", _
                                   "Help Caption", MessageBoxButtons.OK, _
                                   MessageBoxIcon.Question, _
                                   MessageBoxDefaultButton.Button1, _
                                   0, "mspaint.chm", _
                                   HelpNavigator.KeywordIndex, "ovals")

Remarks

Une boîte de message est une boîte de dialogue modale, ce qui signifie qu’aucune entrée (clavier ou clic de souris) ne peut se produire à l’exception des objets du formulaire modal.A message box is a modal dialog box, which means no input (keyboard or mouse click) can occur except to objects on the modal form. Le programme doit masquer ou fermer un formulaire modal (en général, en réponse à une action de l’utilisateur) avant qu’une entrée dans un autre formulaire puisse se produire.The program must hide or close a modal form (typically in response to some user action) before input to another form can occur.

Quand l’utilisateur clique sur le bouton aide, le fichier d’aide spécifié dans le paramètre helpFilePath s’ouvre et le contenu d’aide identifié par le paramètre navigator s’affiche.When the user clicks the Help button, the Help file specified in the helpFilePath parameter is opened and the Help content identified by the navigator parameter is displayed. Le formulaire qui possède la boîte de message (ou le formulaire actif) reçoit également l’événement HelpRequested.The form that owns the message box (or the active form) also receives the HelpRequested event.

Les fichiers d’aide compilés fournissent des tables de matières, d’index, de recherche et de mots clés dans les pages.Compiled help files provide table of contents, index, search, and keyword links in pages. Vous pouvez utiliser les valeurs suivantes pour navigator: TableOfContents, Find, Indexou Topic.You can use the following values for navigator: TableOfContents, Find, Index, or Topic.

Vous pouvez utiliser param pour affiner la commande Topic.You can use param to provide further refinement of the Topic command. Si la valeur spécifiée dans le paramètre navigator est TableOfContents, Indexou Find, cette valeur doit être null.If the value specified in the navigator parameter is TableOfContents, Index, or Find, this value should be null. Si le paramètre navigator référence Topic, cette valeur doit faire référence à un objet qui contient la valeur numérique de la rubrique à afficher.If the navigator parameter references Topic, this value should reference an object that contains the numeric value of the topic to display.

Le paramètre helpFilePath peut être de la forme "C:\path\sample.chm" ou/folder/file.htm.The helpFilePath parameter can be of the form C:\path\sample.chm or /folder/file.htm.

See also

• MessageBoxButtons
• MessageBoxIcon
• MessageBoxDefaultButton
• MessageBoxOptions

public:
 static System::Windows::Forms::DialogResult Show(System::Windows::Forms::IWin32Window ^ owner, System::String ^ text, System::String ^ caption, System::Windows::Forms::MessageBoxButtons buttons, System::Windows::Forms::MessageBoxIcon icon, System::Windows::Forms::MessageBoxDefaultButton defaultButton, System::Windows::Forms::MessageBoxOptions options, System::String ^ helpFilePath);

public static System.Windows.Forms.DialogResult Show (System.Windows.Forms.IWin32Window owner, string text, string caption, System.Windows.Forms.MessageBoxButtons buttons, System.Windows.Forms.MessageBoxIcon icon, System.Windows.Forms.MessageBoxDefaultButton defaultButton, System.Windows.Forms.MessageBoxOptions options, string helpFilePath);

static member Show : System.Windows.Forms.IWin32Window * string * string * System.Windows.Forms.MessageBoxButtons * System.Windows.Forms.MessageBoxIcon * System.Windows.Forms.MessageBoxDefaultButton * System.Windows.Forms.MessageBoxOptions * string -> System.Windows.Forms.DialogResult

Public Shared Function Show (owner As IWin32Window, text As String, caption As String, buttons As MessageBoxButtons, icon As MessageBoxIcon, defaultButton As MessageBoxDefaultButton, options As MessageBoxOptions, helpFilePath As String) As DialogResult

Parameters

Returns

DialogResult

Une des valeurs DialogResult.One of the DialogResult values.

Exceptions

Examples

L’exemple de code suivant montre comment afficher une boîte de message qui est apparentée au formulaire principal.The following code example demonstrates how to show a message box that parented to the main form. La boîte de message affiche un bouton aide.The message box displays a Help button. Quand l’utilisateur clique sur le bouton aide, le fichier d’aide Mspaint.chm est ouvert.When the user clicks the Help button, the Mspaint.chm Help file is opened. L’exemple requiert l’installation du fichier d’aide Mspaint.chm.The example requires that the Mspaint.chm Help file is installed.

#using <System.dll>
#using <System.Windows.Forms.dll>
#using <System.Drawing.dll>

using namespace System;
using namespace System::Drawing;
using namespace System::ComponentModel;
using namespace System::Windows::Forms;

using System;
using System.Drawing;
using System.ComponentModel;
using System.Windows.Forms;

Imports System.Drawing
Imports System.ComponentModel
Imports System.Windows.Forms

// Display a message box parented to the main form. 
// The Help button opens the Mspaint.chm Help file.
System::Windows::Forms::DialogResult r2 = MessageBox::Show( this, "Message with Help file.", "Help Caption", MessageBoxButtons::OK, MessageBoxIcon::Question, MessageBoxDefaultButton::Button1, (MessageBoxOptions)0, "mspaint.chm" );

// Display a message box parented to the main form. 
// The Help button opens the Mspaint.chm Help file.
DialogResult r2 = MessageBox.Show (this, "Message with Help file.", 
                                   "Help Caption", MessageBoxButtons.OK, 
                                   MessageBoxIcon.Question, 
                                   MessageBoxDefaultButton.Button1, 
                                   0, 
                                   "mspaint.chm");

' Display a message box parented to the main form. 
' The Help button opens the Mspaint.chm Help file.
Dim r2 As DialogResult = MessageBox.Show(Me, "Message with Help file.", _
                                   "Help Caption", MessageBoxButtons.OK, _
                                   MessageBoxIcon.Question, _
                                   MessageBoxDefaultButton.Button1, _
                                   0, _
                                   "mspaint.chm")

Remarks

Une boîte de message est une boîte de dialogue modale, ce qui signifie qu’aucune entrée (clavier ou clic de souris) ne peut se produire à l’exception des objets du formulaire modal.A message box is a modal dialog box, which means no input (keyboard or mouse click) can occur except to objects on the modal form. Le programme doit masquer ou fermer un formulaire modal (en général, en réponse à une action de l’utilisateur) avant qu’une entrée dans un autre formulaire puisse se produire.The program must hide or close a modal form (typically in response to some user action) before input to another form can occur. Vous pouvez utiliser le paramètre owner pour spécifier un objet particulier, qui implémente l’interface IWin32Window, qui servira de fenêtre de niveau supérieur et de propriétaire de la boîte de dialogue.You can use the owner parameter to specify a particular object, which implements the IWin32Window interface, that will serve as the dialog box's top-level window and owner.

Quand l’utilisateur clique sur le bouton aide, le fichier d’aide spécifié dans le paramètre helpFilePath est ouvert.When the user clicks the Help button, the Help file specified in the helpFilePath parameter is opened. Le formulaire qui possède la boîte de message (ou le formulaire actif) reçoit également l’événement HelpRequested.The form that owns the message box (or the active form) also receives the HelpRequested event.

Le paramètre helpFilePath peut être de la forme "C:\path\sample.chm" ou/folder/file.htm.The helpFilePath parameter can be of the form C:\path\sample.chm or /folder/file.htm.

See also

• MessageBoxButtons
• MessageBoxIcon
• MessageBoxDefaultButton
• MessageBoxOptions

public:
 static System::Windows::Forms::DialogResult Show(System::String ^ text, System::String ^ caption, System::Windows::Forms::MessageBoxButtons buttons, System::Windows::Forms::MessageBoxIcon icon, System::Windows::Forms::MessageBoxDefaultButton defaultButton, System::Windows::Forms::MessageBoxOptions options, System::String ^ helpFilePath, System::Windows::Forms::HelpNavigator navigator);

public static System.Windows.Forms.DialogResult Show (string text, string caption, System.Windows.Forms.MessageBoxButtons buttons, System.Windows.Forms.MessageBoxIcon icon, System.Windows.Forms.MessageBoxDefaultButton defaultButton, System.Windows.Forms.MessageBoxOptions options, string helpFilePath, System.Windows.Forms.HelpNavigator navigator);

static member Show : string * string * System.Windows.Forms.MessageBoxButtons * System.Windows.Forms.MessageBoxIcon * System.Windows.Forms.MessageBoxDefaultButton * System.Windows.Forms.MessageBoxOptions * string * System.Windows.Forms.HelpNavigator -> System.Windows.Forms.DialogResult

Public Shared Function Show (text As String, caption As String, buttons As MessageBoxButtons, icon As MessageBoxIcon, defaultButton As MessageBoxDefaultButton, options As MessageBoxOptions, helpFilePath As String, navigator As HelpNavigator) As DialogResult

Parameters

Returns

DialogResult

Une des valeurs DialogResult.One of the DialogResult values.

Exceptions

Examples

L’exemple de code suivant montre comment afficher une boîte de message avec un bouton d’aide.The following code example demonstrates how to show a message box with a Help button. Quand l’utilisateur clique sur le bouton aide, le fichier d’aide Mspaint.chm s’ouvre et l’onglet Index de l’aide s’affiche.When the user clicks the Help button, the Mspaint.chm Help file is opened and the Help index tab is displayed. L’exemple requiert l’installation du fichier d’aide Mspaint.chm.The example requires that the Mspaint.chm Help file is installed.

#using <System.dll>
#using <System.Windows.Forms.dll>
#using <System.Drawing.dll>

using namespace System;
using namespace System::Drawing;
using namespace System::ComponentModel;
using namespace System::Windows::Forms;

using System;
using System.Drawing;
using System.ComponentModel;
using System.Windows.Forms;

Imports System.Drawing
Imports System.ComponentModel
Imports System.Windows.Forms

// Display a message box. The Help button opens 
// the Mspaint.chm Help file and shows the Help contents 
// on the Index tab.
System::Windows::Forms::DialogResult r3 = MessageBox::Show( "Message with Help file and Help navigator.", "Help Caption", MessageBoxButtons::OK, MessageBoxIcon::Question, MessageBoxDefaultButton::Button1, (MessageBoxOptions)0, "mspaint.chm", HelpNavigator::Index );

// Display a message box. The Help button opens 
// the Mspaint.chm Help file and shows the Help contents 
// on the Index tab.
DialogResult r3 = MessageBox.Show ("Message with Help file and Help navigator.", 
                                   "Help Caption", MessageBoxButtons.OK,
                                   MessageBoxIcon.Question, 
                                   MessageBoxDefaultButton.Button1, 
                                   0, "mspaint.chm", 
                                   HelpNavigator.Index);

' Display a message box. The Help button opens 
' the Mspaint.chm Help file and shows the Help contents 
' on the Index tab.
Dim r3 As DialogResult = MessageBox.Show("Message with Help file and Help navigator.", _
                                   "Help Caption", MessageBoxButtons.OK, _
                                   MessageBoxIcon.Question, _
                                   MessageBoxDefaultButton.Button1, _
                                   0, "mspaint.chm", _
                                   HelpNavigator.Index)

Remarks

Une boîte de message est une boîte de dialogue modale, ce qui signifie qu’aucune entrée (clavier ou clic de souris) ne peut se produire à l’exception des objets du formulaire modal.A message box is a modal dialog box, which means no input (keyboard or mouse click) can occur except to objects on the modal form. Le programme doit masquer ou fermer un formulaire modal (en général, en réponse à une action de l’utilisateur) avant qu’une entrée dans un autre formulaire puisse se produire.The program must hide or close a modal form (typically in response to some user action) before input to another form can occur.

Quand l’utilisateur clique sur le bouton aide, le fichier d’aide spécifié dans le paramètre helpFilePath s’ouvre et le contenu d’aide identifié par le paramètre navigator s’affiche.When the user clicks the Help button, the help file specified in the helpFilePath parameter is opened and the Help content identified by the navigator parameter is displayed. Le formulaire qui possède la boîte de message (ou le formulaire actif) reçoit également l’événement HelpRequested.The form that owns the message box (or the active form) also receives the HelpRequested event.

Les fichiers d’aide compilés fournissent des tables de matières, d’index, de recherche et de mots clés dans les pages.Compiled Help files provide table of contents, index, search, and keyword links in pages. Vous pouvez utiliser les valeurs suivantes pour navigator: TableOfContents, Find, Indexou Topic.You can use the following values for navigator: TableOfContents, Find, Index, or Topic.

Le paramètre helpFilePath peut être de la forme "C:\path\sample.chm" ou/folder/file.htm.The helpFilePath parameter can be of the form C:\path\sample.chm or /folder/file.htm.

See also

• MessageBoxButtons
• MessageBoxIcon
• MessageBoxDefaultButton
• MessageBoxOptions

public:
 static System::Windows::Forms::DialogResult Show(System::String ^ text, System::String ^ caption, System::Windows::Forms::MessageBoxButtons buttons, System::Windows::Forms::MessageBoxIcon icon, System::Windows::Forms::MessageBoxDefaultButton defaultButton, System::Windows::Forms::MessageBoxOptions options, System::String ^ helpFilePath, System::String ^ keyword);

public static System.Windows.Forms.DialogResult Show (string text, string caption, System.Windows.Forms.MessageBoxButtons buttons, System.Windows.Forms.MessageBoxIcon icon, System.Windows.Forms.MessageBoxDefaultButton defaultButton, System.Windows.Forms.MessageBoxOptions options, string helpFilePath, string keyword);

static member Show : string * string * System.Windows.Forms.MessageBoxButtons * System.Windows.Forms.MessageBoxIcon * System.Windows.Forms.MessageBoxDefaultButton * System.Windows.Forms.MessageBoxOptions * string * string -> System.Windows.Forms.DialogResult

Public Shared Function Show (text As String, caption As String, buttons As MessageBoxButtons, icon As MessageBoxIcon, defaultButton As MessageBoxDefaultButton, options As MessageBoxOptions, helpFilePath As String, keyword As String) As DialogResult

Parameters

Returns

DialogResult

Une des valeurs DialogResult.One of the DialogResult values.

Exceptions

Examples

L’exemple de code suivant montre comment afficher une boîte de message avec un bouton d’aide.The following code example demonstrates how to show a message box with a Help button. Quand l’utilisateur clique sur le bouton aide, le fichier d’aide Mspaint.chm s’ouvre et la rubrique identifiée par le mot clé mspaint.chm::/paint_brush.htm s’affiche.When the user clicks the Help button, the Mspaint.chm Help file is opened and the topic identified by the mspaint.chm::/paint_brush.htm keyword is displayed. L’exemple requiert l’installation du fichier d’aide Mspaint.chm.The example requires that the Mspaint.chm Help file is installed.

#using <System.dll>
#using <System.Windows.Forms.dll>
#using <System.Drawing.dll>

using namespace System;
using namespace System::Drawing;
using namespace System::ComponentModel;
using namespace System::Windows::Forms;

using System;
using System.Drawing;
using System.ComponentModel;
using System.Windows.Forms;

Imports System.Drawing
Imports System.ComponentModel
Imports System.Windows.Forms

// Display a message box. The Help button opens the Mspaint.chm Help file, 
// and the "mspaint.chm::/paint_brush.htm" Help keyword shows the 
// associated topic.
System::Windows::Forms::DialogResult r7 = MessageBox::Show( "Message with Help file and keyword.", "Help Caption", MessageBoxButtons::OK, MessageBoxIcon::Question, MessageBoxDefaultButton::Button1, (MessageBoxOptions)0, "mspaint.chm", "mspaint.chm::/paint_brush.htm" );

// Display a message box. The Help button opens the Mspaint.chm Help file, 
// and the "mspaint.chm::/paint_brush.htm" Help keyword shows the 
// associated topic.
DialogResult r7 = MessageBox.Show ("Message with Help file and keyword.", 
                                   "Help Caption", MessageBoxButtons.OK, 
                                   MessageBoxIcon.Question, 
                                   MessageBoxDefaultButton.Button1, 0, 
                                   "mspaint.chm", 
                                   "mspaint.chm::/paint_brush.htm");

' Display a message box. The Help button opens the Mspaint.chm Help file, 
' and the "mspaint.chm::/paint_brush.htm" Help keyword shows the 
' associated topic.
Dim r7 As DialogResult = MessageBox.Show("Message with Help file and keyword.", _
                                   "Help Caption", MessageBoxButtons.OK, _
                                   MessageBoxIcon.Question, _
                                   MessageBoxDefaultButton.Button1, 0, _
                                   "mspaint.chm", _
                                   "mspaint.chm::/paint_brush.htm")

Remarks

Une boîte de message est une boîte de dialogue modale, ce qui signifie qu’aucune entrée (clavier ou clic de souris) ne peut se produire à l’exception des objets du formulaire modal.A message box is a modal dialog box, which means no input (keyboard or mouse click) can occur except to objects on the modal form. Le programme doit masquer ou fermer un formulaire modal (en général, en réponse à une action de l’utilisateur) avant qu’une entrée dans un autre formulaire puisse se produire.The program must hide or close a modal form (typically in response to some user action) before input to another form can occur.

Quand l’utilisateur clique sur le bouton aide, le fichier d’aide spécifié dans le paramètre helpFilePath s’ouvre et la rubrique de mot clé d’aide identifiée par le paramètre keyword s’affiche.When the user clicks the Help button, the Help file specified in the helpFilePath parameter is opened and the Help keyword topic identified by the keyword parameter is displayed. Le formulaire qui possède la boîte de message (ou le formulaire actif) reçoit également l’événement HelpRequested.The form that owns the message box (or the active form) also receives the HelpRequested event.

See also

• MessageBoxButtons
• MessageBoxIcon
• MessageBoxDefaultButton
• MessageBoxOptions

public:
 static System::Windows::Forms::DialogResult Show(System::Windows::Forms::IWin32Window ^ owner, System::String ^ text, System::String ^ caption, System::Windows::Forms::MessageBoxButtons buttons, System::Windows::Forms::MessageBoxIcon icon, System::Windows::Forms::MessageBoxDefaultButton defaultButton, System::Windows::Forms::MessageBoxOptions options);

public static System.Windows.Forms.DialogResult Show (System.Windows.Forms.IWin32Window owner, string text, string caption, System.Windows.Forms.MessageBoxButtons buttons, System.Windows.Forms.MessageBoxIcon icon, System.Windows.Forms.MessageBoxDefaultButton defaultButton, System.Windows.Forms.MessageBoxOptions options);

static member Show : System.Windows.Forms.IWin32Window * string * string * System.Windows.Forms.MessageBoxButtons * System.Windows.Forms.MessageBoxIcon * System.Windows.Forms.MessageBoxDefaultButton * System.Windows.Forms.MessageBoxOptions -> System.Windows.Forms.DialogResult

Public Shared Function Show (owner As IWin32Window, text As String, caption As String, buttons As MessageBoxButtons, icon As MessageBoxIcon, defaultButton As MessageBoxDefaultButton, options As MessageBoxOptions) As DialogResult

Parameters

Returns

DialogResult

Une des valeurs DialogResult.One of the DialogResult values.

Exceptions

Examples

L’exemple de code suivant montre comment afficher une MessageBox avec les options prises en charge par cette surcharge de Show.The following code example demonstrates how to display a MessageBox with the options supported by this overload of Show. Après avoir vérifié qu’une variable de chaîne, ServerName, est vide, l’exemple affiche une MessageBox, offrant à l’utilisateur la possibilité d’annuler l’opération.After verifying that a string variable, ServerName, is empty, the example displays a MessageBox, offering the user the option to cancel the operation. Si la valeur de retour de la méthode Show prend la valeur Yes, le formulaire qui affichait le MessageBox est fermé.If the Show method's return value evaluates to Yes, the form that displayed the MessageBox is closed.

private:
   void validateUserEntry2()
   {
      // Checks the value of the text.
      if ( serverName->Text->Length == 0 )
      {
         // Initializes the variables to pass to the MessageBox::Show method.
         String^ message = "You did not enter a server name. Cancel this operation?";
         String^ caption = "No Server Name Specified";
         MessageBoxButtons buttons = MessageBoxButtons::YesNo;
         System::Windows::Forms::DialogResult result;
         
         // Displays the MessageBox.
         result = MessageBox::Show( this, message, caption, buttons, MessageBoxIcon::Question, MessageBoxDefaultButton::Button1, MessageBoxOptions::RightAlign );
         if ( result == ::DialogResult::Yes )
         {
            // Closes the parent form.
            this->Close();
         }
      }
   }

private void validateUserEntry2()
{

    // Checks the value of the text.

    if(serverName.Text.Length == 0)
    {

        // Initializes the variables to pass to the MessageBox.Show method.

        string message = "You did not enter a server name. Cancel this operation?";
        string caption = "No Server Name Specified";
        MessageBoxButtons buttons = MessageBoxButtons.YesNo;
        DialogResult result;

        // Displays the MessageBox.

        result = MessageBox.Show(this, message, caption, buttons,
            MessageBoxIcon.Question, MessageBoxDefaultButton.Button1, 
            MessageBoxOptions.RightAlign);

        if(result == DialogResult.Yes)
        {

            // Closes the parent form.

            this.Close();
        }
    }
}

Private Sub ValidateUserEntry2()


    ' Checks the value of the text.

    If ServerName.Text.Length = 0 Then

        ' Initializes variables to pass to the MessageBox.Show method.

        Dim Message As String = "You did not enter a server name. Cancel this operation?"
        Dim Caption As String = "No Server Name Specified"
        Dim Buttons As Integer = MessageBoxButtons.YesNo

        Dim Result As DialogResult

        'Displays a MessageBox using the Question icon and specifying the No button as the default.

        Result = MessageBox.Show(Me, Message, Caption, MessageBoxButtons.YesNo, _
            MessageBoxIcon.Question, MessageBoxDefaultButton.Button1, MessageBoxOptions.RightAlign)


        ' Gets the result of the MessageBox display.

        If Result = System.Windows.Forms.DialogResult.Yes Then

            ' Closes the parent form.

            Me.Close()

        End If

    End If

End Sub

Remarks

Vous pouvez utiliser le paramètre owner pour spécifier un objet particulier, qui implémente l’interface IWin32Window, qui servira de fenêtre de niveau supérieur et de propriétaire de la boîte de dialogue.You can use the owner parameter to specify a particular object, which implements the IWin32Window interface, that will serve as the dialog box's top-level window and owner. Une boîte de message est une boîte de dialogue modale, ce qui signifie qu’aucune entrée (clavier ou clic de souris) ne peut se produire à l’exception des objets du formulaire modal.A message box is a modal dialog box, which means no input (keyboard or mouse click) can occur except to objects on the modal form. Le programme doit masquer ou fermer un formulaire modal (en général, en réponse à une action de l’utilisateur) avant qu’une entrée dans un autre formulaire puisse se produire.The program must hide or close a modal form (typically in response to some user action) before input to another form can occur.

Vous pouvez avoir un maximum de trois boutons sur la boîte de message.You can have a maximum of three buttons on the message box.

See also

• MessageBoxButtons
• MessageBoxIcon
• MessageBoxDefaultButton
• MessageBoxOptions

public:
 static System::Windows::Forms::DialogResult Show(System::String ^ text, System::String ^ caption, System::Windows::Forms::MessageBoxButtons buttons, System::Windows::Forms::MessageBoxIcon icon, System::Windows::Forms::MessageBoxDefaultButton defaultButton, System::Windows::Forms::MessageBoxOptions options, System::String ^ helpFilePath);

public static System.Windows.Forms.DialogResult Show (string text, string caption, System.Windows.Forms.MessageBoxButtons buttons, System.Windows.Forms.MessageBoxIcon icon, System.Windows.Forms.MessageBoxDefaultButton defaultButton, System.Windows.Forms.MessageBoxOptions options, string helpFilePath);

static member Show : string * string * System.Windows.Forms.MessageBoxButtons * System.Windows.Forms.MessageBoxIcon * System.Windows.Forms.MessageBoxDefaultButton * System.Windows.Forms.MessageBoxOptions * string -> System.Windows.Forms.DialogResult

Public Shared Function Show (text As String, caption As String, buttons As MessageBoxButtons, icon As MessageBoxIcon, defaultButton As MessageBoxDefaultButton, options As MessageBoxOptions, helpFilePath As String) As DialogResult

Parameters

Returns

DialogResult

Une des valeurs DialogResult.One of the DialogResult values.

Exceptions

Examples

L’exemple de code suivant montre comment afficher une boîte de message avec un bouton d’aide.The following code example demonstrates how to show a message box with a Help button. Quand l’utilisateur clique sur le bouton aide, le fichier d’aide Mspaint.chm est ouvert.When the user clicks the Help button, the Mspaint.chm Help file is opened. L’exemple requiert l’installation du fichier d’aide Mspaint.chm.The example requires that the Mspaint.chm Help file is installed.

#using <System.dll>
#using <System.Windows.Forms.dll>
#using <System.Drawing.dll>

using namespace System;
using namespace System::Drawing;
using namespace System::ComponentModel;
using namespace System::Windows::Forms;

using System;
using System.Drawing;
using System.ComponentModel;
using System.Windows.Forms;

Imports System.Drawing
Imports System.ComponentModel
Imports System.Windows.Forms

// Display a message box with a help button. 
// The Help button opens the Mspaint.chm Help file.
System::Windows::Forms::DialogResult r1 = MessageBox::Show( "Message with Help file.", "Help Caption", MessageBoxButtons::OK, MessageBoxIcon::Question, MessageBoxDefaultButton::Button1, (MessageBoxOptions)0, "mspaint.chm" );

// Display a message box with a help button. 
// The Help button opens the Mspaint.chm Help file.
DialogResult r1 = MessageBox.Show ("Message with Help file.", 
                                   "Help Caption", MessageBoxButtons.OK, 
                                   MessageBoxIcon.Question, 
                                   MessageBoxDefaultButton.Button1, 
                                   0, 
                                   "mspaint.chm");

' Display a message box with a help button. 
' The Help button opens the Mspaint.chm Help file.
Dim r1 As DialogResult = MessageBox.Show("Message with Help file.", _
                                   "Help Caption", MessageBoxButtons.OK, _
                                   MessageBoxIcon.Question, _
                                   MessageBoxDefaultButton.Button1, _
                                   0, _
                                   "mspaint.chm")

Remarks

Une boîte de message est une boîte de dialogue modale, ce qui signifie qu’aucune entrée (clavier ou clic de souris) ne peut se produire à l’exception des objets du formulaire modal.A message box is a modal dialog box, which means no input (keyboard or mouse click) can occur except to objects on the modal form. Le programme doit masquer ou fermer un formulaire modal (en général, en réponse à une action de l’utilisateur) avant qu’une entrée dans un autre formulaire puisse se produire.The program must hide or close a modal form (typically in response to some user action) before input to another form can occur.

Quand l’utilisateur clique sur le bouton aide, le fichier d’aide spécifié dans le paramètre helpFilePath est ouvert.When the user clicks Help button, the Help file specified in the helpFilePath parameter is opened. Le formulaire qui possède la boîte de message (ou le formulaire actif) reçoit également l’événement HelpRequested.The form that owns the message box (or the active form) also receives the HelpRequested event.

Le paramètre helpFilePath peut être de la forme "C:\path\sample.chm" ou/folder/file.htm.The helpFilePath parameter can be of the form C:\path\sample.chm or /folder/file.htm.

See also

• MessageBoxButtons
• MessageBoxIcon
• MessageBoxDefaultButton
• MessageBoxOptions

public:
 static System::Windows::Forms::DialogResult Show(System::String ^ text, System::String ^ caption, System::Windows::Forms::MessageBoxButtons buttons, System::Windows::Forms::MessageBoxIcon icon, System::Windows::Forms::MessageBoxDefaultButton defaultButton, System::Windows::Forms::MessageBoxOptions options, bool displayHelpButton);

public static System.Windows.Forms.DialogResult Show (string text, string caption, System.Windows.Forms.MessageBoxButtons buttons, System.Windows.Forms.MessageBoxIcon icon, System.Windows.Forms.MessageBoxDefaultButton defaultButton, System.Windows.Forms.MessageBoxOptions options, bool displayHelpButton);

static member Show : string * string * System.Windows.Forms.MessageBoxButtons * System.Windows.Forms.MessageBoxIcon * System.Windows.Forms.MessageBoxDefaultButton * System.Windows.Forms.MessageBoxOptions * bool -> System.Windows.Forms.DialogResult

Public Shared Function Show (text As String, caption As String, buttons As MessageBoxButtons, icon As MessageBoxIcon, defaultButton As MessageBoxDefaultButton, options As MessageBoxOptions, displayHelpButton As Boolean) As DialogResult

Parameters

Returns

DialogResult

Une des valeurs DialogResult.One of the DialogResult values.

Exceptions

Examples

L’exemple de code suivant montre comment afficher une boîte de message avec un bouton d’aide, gérer l’événement Control.HelpRequested et afficher une fenêtre d’aide personnalisée en réponse à l’événement.The following code example demonstrates how to show a message box with a Help button, handle the Control.HelpRequested event, and show a custom help window in response to the event.

#using <System.dll>
#using <System.Windows.Forms.dll>
#using <System.Drawing.dll>

using namespace System;
using namespace System::Drawing;
using namespace System::ComponentModel;
using namespace System::Windows::Forms;

using System;
using System.Drawing;
using System.ComponentModel;
using System.Windows.Forms;

Imports System.Drawing
Imports System.ComponentModel
Imports System.Windows.Forms

// Display a message box with a Help button. Show a custom Help window
// by handling the HelpRequested event.
System::Windows::Forms::DialogResult AlertMessageWithCustomHelpWindow()
{
   
   // Handle the HelpRequested event for the following message.
   this->HelpRequested += gcnew System::Windows::Forms::HelpEventHandler( this, &Form1::Form1_HelpRequested );
   this->Tag = "Message with Help button.";
   
   // Show a message box with OK and Help buttons.
   System::Windows::Forms::DialogResult r = MessageBox::Show( "Message with Help button.", "Help Caption", MessageBoxButtons::OK, MessageBoxIcon::Question, MessageBoxDefaultButton::Button1, (MessageBoxOptions)0, true );
   
   // Remove the HelpRequested event handler to keep the event
   // from being handled for other message boxes.
   this->HelpRequested -= gcnew System::Windows::Forms::HelpEventHandler( this, &Form1::Form1_HelpRequested );
   
   // Return the dialog box result.
   return r;
}

void Form1_HelpRequested( System::Object^ sender, System::Windows::Forms::HelpEventArgs^ hlpevent )
{
   
   // Create a custom Help window in response to the HelpRequested event.
   Form^ helpForm = gcnew Form;
   
   // Set up the form position, size, and title caption.
   helpForm->StartPosition = FormStartPosition::Manual;
   helpForm->Size = System::Drawing::Size( 200, 400 );
   helpForm->DesktopLocation = Point(this->DesktopBounds.X + this->Size.Width,this->DesktopBounds.Top);
   helpForm->Text = "Help Form";
   
   // Create a label to contain the Help text.
   Label^ helpLabel = gcnew Label;
   
   // Add the label to the form and set its text.
   helpForm->Controls->Add( helpLabel );
   helpLabel->Dock = DockStyle::Fill;
   
   // Use the sender parameter to identify the context of the Help request.
   // The parameter must be cast to the Control type to get the Tag property.
   Control^ senderControl = dynamic_cast<Control^>(sender);
   helpLabel->Text = String::Format( "Help information shown in response to user action on the '{0}' message.", dynamic_cast<String^>(senderControl->Tag) );
   
   // Set the Help form to be owned by the main form. This helps
   // to ensure that the Help form is disposed of.
   this->AddOwnedForm( helpForm );
   
   // Show the custom Help window.
   helpForm->Show();
   
   // Indicate that the HelpRequested event is handled.
   hlpevent->Handled = true;
}

// Display a message box with a Help button. Show a custom Help window
// by handling the HelpRequested event.
private DialogResult AlertMessageWithCustomHelpWindow ()
{
    // Handle the HelpRequested event for the following message.
    this.HelpRequested += new System.Windows.Forms.HelpEventHandler (this.Form1_HelpRequested);

    this.Tag = "Message with Help button.";

    // Show a message box with OK and Help buttons.
    DialogResult r = MessageBox.Show ("Message with Help button.", 
                                      "Help Caption", MessageBoxButtons.OK, 
                                      MessageBoxIcon.Question, 
                                      MessageBoxDefaultButton.Button1, 
                                      0, true);

    // Remove the HelpRequested event handler to keep the event
    // from being handled for other message boxes.
    this.HelpRequested -= new System.Windows.Forms.HelpEventHandler (this.Form1_HelpRequested);

    // Return the dialog box result.
    return r;
}

private void Form1_HelpRequested (System.Object sender, System.Windows.Forms.HelpEventArgs hlpevent)
{
    // Create a custom Help window in response to the HelpRequested event.
    Form helpForm = new Form ();

    // Set up the form position, size, and title caption.
    helpForm.StartPosition = FormStartPosition.Manual;
    helpForm.Size = new Size (200, 400);
    helpForm.DesktopLocation = new Point (this.DesktopBounds.X + 
                                          this.Size.Width, 
                                          this.DesktopBounds.Top);
    helpForm.Text = "Help Form";

    // Create a label to contain the Help text.
    Label helpLabel = new Label ();

    // Add the label to the form and set its text.
    helpForm.Controls.Add (helpLabel);
    helpLabel.Dock = DockStyle.Fill;

    // Use the sender parameter to identify the context of the Help request.
    // The parameter must be cast to the Control type to get the Tag property.
    Control senderControl = sender as Control;

    helpLabel.Text = "Help information shown in response to user action on the '" + 
                      (string)senderControl.Tag + "' message.";

    // Set the Help form to be owned by the main form. This helps
    // to ensure that the Help form is disposed of.
    this.AddOwnedForm (helpForm);

    // Show the custom Help window.
    helpForm.Show ();

    // Indicate that the HelpRequested event is handled.
    hlpevent.Handled = true;
}

' Display a message box with a Help button. Show a custom Help window
' by handling the HelpRequested event.
Private Function AlertMessageWithCustomHelpWindow() As DialogResult

    ' Handle the HelpRequested event for the following message.
    AddHandler Me.HelpRequested, AddressOf Me.Form1_HelpRequested

    Me.Tag = "Message with Help button."

    ' Show a message box with OK and Help buttons.
    Dim r As DialogResult = MessageBox.Show("Message with Help button.", _
                                          "Help Caption", MessageBoxButtons.OK, _
                                          MessageBoxIcon.Question, _
                                          MessageBoxDefaultButton.Button1, _
                                          0, True)

    ' Remove the HelpRequested event handler to keep the event
    ' from being handled for other message boxes.
    RemoveHandler Me.HelpRequested, AddressOf Me.Form1_HelpRequested

    ' Return the dialog box result.
    Return r
End Function

Private Sub Form1_HelpRequested(ByVal sender As System.Object, ByVal hlpevent As System.Windows.Forms.HelpEventArgs)

    ' Create a custom Help window in response to the HelpRequested event.
    Dim helpForm As Form = New Form

    ' Set up the form position, size, and title caption.
    With helpForm
        .StartPosition = FormStartPosition.Manual
        .Size = New Size(200, 400)
        .DesktopLocation = New Point(Me.DesktopBounds.X + _
                                     Me.Size.Width, Me.DesktopBounds.Top)
        .Text = "Help Form"
    End With

    ' Create a label to contain the Help text.
    Dim helpLabel As Label = New Label

    ' Add the label to the form and set its text.
    helpForm.Controls.Add(helpLabel)
    helpLabel.Dock = DockStyle.Fill

    ' Use the sender parameter to identify the context of the Help request.
    ' The parameter must be cast to the Control type to get the Tag property.
    Dim senderControl As Control = CType(sender, Control)

    helpLabel.Text = "Help information shown in response to user action on the '" & _
                      CStr(senderControl.Tag) & "' message."

    ' Set the Help form to be owned by the main form. This helps
    ' to ensure that the Help form is disposed of.
    Me.AddOwnedForm(helpForm)

    ' Show the custom Help window.
    helpForm.Show()

    ' Indicate that the HelpRequested event is handled.
    hlpevent.Handled = True
End Sub

Remarks

Une boîte de message est une boîte de dialogue modale, ce qui signifie qu’aucune entrée (clavier ou clic de souris) ne peut se produire à l’exception des objets du formulaire modal.A message box is a modal dialog box, which means no input (keyboard or mouse click) can occur except to objects on the modal form. Le programme doit masquer ou fermer un formulaire modal (en général, en réponse à une action de l’utilisateur) avant qu’une entrée dans un autre formulaire puisse se produire.The program must hide or close a modal form (typically in response to some user action) before input to another form can occur.

Quand l’utilisateur clique sur le bouton aide, le formulaire qui possède la boîte de message (ou le formulaire actif) reçoit l’événement HelpRequested.When the user clicks the Help button, the form that owns the message box (or the active form) receives the HelpRequested event. Gérez l’événement HelpRequested pour effectuer des actions d’aide personnalisées.Handle the HelpRequested event to perform custom Help actions.

See also

• MessageBoxButtons
• MessageBoxIcon
• MessageBoxDefaultButton
• MessageBoxOptions

public:
 static System::Windows::Forms::DialogResult Show(System::Windows::Forms::IWin32Window ^ owner, System::String ^ text, System::String ^ caption, System::Windows::Forms::MessageBoxButtons buttons, System::Windows::Forms::MessageBoxIcon icon, System::Windows::Forms::MessageBoxDefaultButton defaultButton, System::Windows::Forms::MessageBoxOptions options, System::String ^ helpFilePath, System::Windows::Forms::HelpNavigator navigator);

public static System.Windows.Forms.DialogResult Show (System.Windows.Forms.IWin32Window owner, string text, string caption, System.Windows.Forms.MessageBoxButtons buttons, System.Windows.Forms.MessageBoxIcon icon, System.Windows.Forms.MessageBoxDefaultButton defaultButton, System.Windows.Forms.MessageBoxOptions options, string helpFilePath, System.Windows.Forms.HelpNavigator navigator);

static member Show : System.Windows.Forms.IWin32Window * string * string * System.Windows.Forms.MessageBoxButtons * System.Windows.Forms.MessageBoxIcon * System.Windows.Forms.MessageBoxDefaultButton * System.Windows.Forms.MessageBoxOptions * string * System.Windows.Forms.HelpNavigator -> System.Windows.Forms.DialogResult

Public Shared Function Show (owner As IWin32Window, text As String, caption As String, buttons As MessageBoxButtons, icon As MessageBoxIcon, defaultButton As MessageBoxDefaultButton, options As MessageBoxOptions, helpFilePath As String, navigator As HelpNavigator) As DialogResult

Parameters

Returns

DialogResult

Une des valeurs DialogResult.One of the DialogResult values.

Exceptions

Examples

L’exemple de code suivant montre comment afficher une boîte de message apparenté à la fenêtre principale.The following code example demonstrates how to show a message box parented to the main window. La boîte de message affiche un bouton aide.The message box displays a Help button. Quand l’utilisateur clique sur le bouton aide, le fichier d’aide Mspaint.chm s’ouvre et l’onglet Index de l’aide s’affiche.When the user clicks the Help button, the Mspaint.chm Help file is opened and the Help index tab is displayed. L’exemple requiert l’installation du fichier d’aide Mspaint.chm.The example requires that the Mspaint.chm Help file is installed.

#using <System.dll>
#using <System.Windows.Forms.dll>
#using <System.Drawing.dll>

using namespace System;
using namespace System::Drawing;
using namespace System::ComponentModel;
using namespace System::Windows::Forms;

using System;
using System.Drawing;
using System.ComponentModel;
using System.Windows.Forms;

Imports System.Drawing
Imports System.ComponentModel
Imports System.Windows.Forms

// Display message box parented to the main form. 
// The Help button opens the Mspaint.chm Help file
// and shows the Help contents on the Index tab.
System::Windows::Forms::DialogResult r4 = MessageBox::Show( this, "Message with Help file and Help navigator.", "Help Caption", MessageBoxButtons::OK, MessageBoxIcon::Question, MessageBoxDefaultButton::Button1, (MessageBoxOptions)0, "mspaint.chm", HelpNavigator::Index );

// Display message box parented to the main form. 
// The Help button opens the Mspaint.chm Help file
// and shows the Help contents on the Index tab.
DialogResult r4 = MessageBox.Show (this, 
                                   "Message with Help file and Help navigator.", 
                                   "Help Caption", MessageBoxButtons.OK,
                                   MessageBoxIcon.Question, 
                                   MessageBoxDefaultButton.Button1, 
                                   0, "mspaint.chm", 
                                   HelpNavigator.Index);

' Display message box parented to the main form. 
' The Help button opens the Mspaint.chm Help file
' and shows the Help contents on the Index tab.
Dim r4 As DialogResult = MessageBox.Show(Me, _
                                      "Message with Help file and Help navigator.", _
                                      "Help Caption", MessageBoxButtons.OK, _
                                      MessageBoxIcon.Question, _
                                      MessageBoxDefaultButton.Button1, _
                                      0, "mspaint.chm", _
                                      HelpNavigator.Index)

Remarks

Une boîte de message est une boîte de dialogue modale, ce qui signifie qu’aucune entrée (clavier ou clic de souris) ne peut se produire à l’exception des objets du formulaire modal.A message box is a modal dialog box, which means no input (keyboard or mouse click) can occur except to objects on the modal form. Le programme doit masquer ou fermer un formulaire modal (en général, en réponse à une action de l’utilisateur) avant qu’une entrée dans un autre formulaire puisse se produire.The program must hide or close a modal form (typically in response to some user action) before input to another form can occur. Vous pouvez utiliser le paramètre owner pour spécifier un objet particulier, qui implémente l’interface IWin32Window, qui servira de fenêtre de niveau supérieur et de propriétaire de la boîte de dialogue.You can use the owner parameter to specify a particular object, which implements the IWin32Window interface, that will serve as the dialog box's top-level window and owner.

Quand l’utilisateur clique sur le bouton aide, le fichier d’aide spécifié dans le paramètre helpFilePath s’ouvre et le contenu d’aide identifié par le paramètre navigator s’affiche.When the user clicks the Help button, the Help file specified in the helpFilePath parameter is opened and the Help content identified by the navigator parameter is displayed. Le formulaire qui possède la boîte de message (ou le formulaire actif) reçoit également l’événement HelpRequested.The form that owns the message box (or the active form) also receives the HelpRequested event.

Les fichiers d’aide compilés fournissent des tables de matières, d’index, de recherche et de mots clés dans les pages.Compiled Help files provide table of contents, index, search, and keyword links in pages. Vous pouvez utiliser les valeurs suivantes pour navigator: TableOfContents, Find, Indexou Topic.You can use the following values for navigator: TableOfContents, Find, Index, or Topic.

Le paramètre helpFilePath peut être de la forme "C:\path\sample.chm" ou/folder/file.htm.The helpFilePath parameter can be of the form C:\path\sample.chm or /folder/file.htm.

See also

• MessageBoxButtons
• MessageBoxIcon
• MessageBoxDefaultButton
• MessageBoxOptions

public:
 static System::Windows::Forms::DialogResult Show(System::Windows::Forms::IWin32Window ^ owner, System::String ^ text, System::String ^ caption, System::Windows::Forms::MessageBoxButtons buttons, System::Windows::Forms::MessageBoxIcon icon, System::Windows::Forms::MessageBoxDefaultButton defaultButton);

public static System.Windows.Forms.DialogResult Show (System.Windows.Forms.IWin32Window owner, string text, string caption, System.Windows.Forms.MessageBoxButtons buttons, System.Windows.Forms.MessageBoxIcon icon, System.Windows.Forms.MessageBoxDefaultButton defaultButton);

static member Show : System.Windows.Forms.IWin32Window * string * string * System.Windows.Forms.MessageBoxButtons * System.Windows.Forms.MessageBoxIcon * System.Windows.Forms.MessageBoxDefaultButton -> System.Windows.Forms.DialogResult

Public Shared Function Show (owner As IWin32Window, text As String, caption As String, buttons As MessageBoxButtons, icon As MessageBoxIcon, defaultButton As MessageBoxDefaultButton) As DialogResult

Parameters

Returns

DialogResult

Une des valeurs DialogResult.One of the DialogResult values.

Exceptions

Examples

L’exemple de code suivant montre comment afficher une MessageBox avec les options prises en charge par cette surcharge de Show.The following code example demonstrates how to display a MessageBox with the options supported by this overload of Show. Après avoir vérifié qu’une variable de chaîne, ServerName, est vide, l’exemple affiche une MessageBox, offrant à l’utilisateur la possibilité d’annuler l’opération.After verifying that a string variable, ServerName, is empty, the example displays a MessageBox, offering the user the option to cancel the operation. Si la valeur de retour de la méthode Show prend la valeur Yes, le formulaire qui affichait le MessageBox est fermé.If the Show method's return value evaluates to Yes, the form that displayed the MessageBox is closed.

private:
   void validateUserEntry2()
   {
      // Checks the value of the text.
      if ( serverName->Text->Length == 0 )
      {
         // Initializes the variables to pass to the MessageBox::Show method.
         String^ message = "You did not enter a server name. Cancel this operation?";
         String^ caption = "No Server Name Specified";
         MessageBoxButtons buttons = MessageBoxButtons::YesNo;
         System::Windows::Forms::DialogResult result;
         
         // Displays the MessageBox.
         result = MessageBox::Show( this, message, caption, buttons, MessageBoxIcon::Question, MessageBoxDefaultButton::Button1, MessageBoxOptions::RightAlign );
         if ( result == ::DialogResult::Yes )
         {
            // Closes the parent form.
            this->Close();
         }
      }
   }

private void validateUserEntry2()
{

    // Checks the value of the text.

    if(serverName.Text.Length == 0)
    {

        // Initializes the variables to pass to the MessageBox.Show method.

        string message = "You did not enter a server name. Cancel this operation?";
        string caption = "No Server Name Specified";
        MessageBoxButtons buttons = MessageBoxButtons.YesNo;
        DialogResult result;

        // Displays the MessageBox.

        result = MessageBox.Show(this, message, caption, buttons,
            MessageBoxIcon.Question, MessageBoxDefaultButton.Button1, 
            MessageBoxOptions.RightAlign);

        if(result == DialogResult.Yes)
        {

            // Closes the parent form.

            this.Close();
        }
    }
}

Private Sub ValidateUserEntry2()


    ' Checks the value of the text.

    If ServerName.Text.Length = 0 Then

        ' Initializes variables to pass to the MessageBox.Show method.

        Dim Message As String = "You did not enter a server name. Cancel this operation?"
        Dim Caption As String = "No Server Name Specified"
        Dim Buttons As Integer = MessageBoxButtons.YesNo

        Dim Result As DialogResult

        'Displays a MessageBox using the Question icon and specifying the No button as the default.

        Result = MessageBox.Show(Me, Message, Caption, MessageBoxButtons.YesNo, _
            MessageBoxIcon.Question, MessageBoxDefaultButton.Button1, MessageBoxOptions.RightAlign)


        ' Gets the result of the MessageBox display.

        If Result = System.Windows.Forms.DialogResult.Yes Then

            ' Closes the parent form.

            Me.Close()

        End If

    End If

End Sub

Remarks

Vous pouvez utiliser le paramètre owner pour spécifier un objet particulier, qui implémente l’interface IWin32Window, qui servira de fenêtre de niveau supérieur et de propriétaire de la boîte de dialogue.You can use the owner parameter to specify a particular object, which implements the IWin32Window interface, that will serve as the dialog box's top-level window and owner. Une boîte de message est une boîte de dialogue modale, ce qui signifie qu’aucune entrée (clavier ou clic de souris) ne peut se produire à l’exception des objets du formulaire modal.A message box is a modal dialog box, which means no input (keyboard or mouse click) can occur except to objects on the modal form. Le programme doit masquer ou fermer un formulaire modal (en général, en réponse à une action de l’utilisateur) avant qu’une entrée dans un autre formulaire puisse se produire.The program must hide or close a modal form (typically in response to some user action) before input to another form can occur.

Vous pouvez avoir un maximum de trois boutons sur la boîte de message.You can have a maximum of three buttons on the message box.

See also

• MessageBoxButtons
• MessageBoxIcon
• MessageBoxDefaultButton

public:
 static System::Windows::Forms::DialogResult Show(System::Windows::Forms::IWin32Window ^ owner, System::String ^ text, System::String ^ caption, System::Windows::Forms::MessageBoxButtons buttons, System::Windows::Forms::MessageBoxIcon icon);

public static System.Windows.Forms.DialogResult Show (System.Windows.Forms.IWin32Window owner, string text, string caption, System.Windows.Forms.MessageBoxButtons buttons, System.Windows.Forms.MessageBoxIcon icon);

static member Show : System.Windows.Forms.IWin32Window * string * string * System.Windows.Forms.MessageBoxButtons * System.Windows.Forms.MessageBoxIcon -> System.Windows.Forms.DialogResult

Public Shared Function Show (owner As IWin32Window, text As String, caption As String, buttons As MessageBoxButtons, icon As MessageBoxIcon) As DialogResult

Parameters

Returns

DialogResult

Une des valeurs DialogResult.One of the DialogResult values.

Exceptions

Examples

L’exemple de code suivant montre comment afficher une MessageBox avec les options prises en charge par cette surcharge de Show.The following code example demonstrates how to display a MessageBox with the options supported by this overload of Show. Après avoir vérifié qu’une variable de chaîne, ServerName, est vide, l’exemple affiche une MessageBox, offrant à l’utilisateur la possibilité d’annuler l’opération.After verifying that a string variable, ServerName, is empty, the example displays a MessageBox, offering the user the option to cancel the operation. Si la valeur de retour de la méthode Show prend la valeur Yes, le formulaire qui affichait le MessageBox est fermé.If the Show method's return value evaluates to Yes, the form that displayed the MessageBox is closed.

private:
   void validateUserEntry4()
   {
      // Checks the value of the text.
      if ( serverName->Text->Length == 0 )
      {
         // Initializes the variables to pass to the MessageBox::Show method.
         String^ message = "You did not enter a server name. Cancel this operation?";
         String^ caption = "No Server Name Specified";
         MessageBoxButtons buttons = MessageBoxButtons::YesNo;
         System::Windows::Forms::DialogResult result;

         // Displays the MessageBox.
         result = MessageBox::Show( this, message, caption, buttons, MessageBoxIcon::Question );
         if ( result == ::DialogResult::Yes )
         {
            // Closes the parent form.
            this->Close();
         }
      }
   }

private void validateUserEntry4()
{

    // Checks the value of the text.

    if(serverName.Text.Length == 0)
    {

        // Initializes the variables to pass to the MessageBox.Show method.

        string message = "You did not enter a server name. Cancel this operation?";
        string caption = "No Server Name Specified";
        MessageBoxButtons buttons = MessageBoxButtons.YesNo;
        DialogResult result;

        // Displays the MessageBox.

        result = MessageBox.Show(this, message, caption, buttons,
            MessageBoxIcon.Question);

        if(result == DialogResult.Yes)
        {

            // Closes the parent form.

            this.Close();
        }
    }
}

Private Sub ValidateUserEntry4()

    ' Checks the value of the text.

    If ServerName.Text.Length = 0 Then

        ' Initializes variables to pass to the MessageBox.Show method.

        Dim Message As String = "You did not enter a server name. Cancel this operation?"
        Dim Caption As String = "No Server Name Specified"
        Dim Buttons As Integer = MessageBoxButtons.YesNo

        Dim Result As DialogResult

        'Displays a MessageBox using the Question icon and specifying the No button as the default.

        Result = MessageBox.Show(Me, Message, Caption, MessageBoxButtons.YesNo, MessageBoxIcon.Question)

        ' Gets the result of the MessageBox display.

        If Result = System.Windows.Forms.DialogResult.Yes Then

            ' Closes the parent form.

            Me.Close()

        End If

    End If

End Sub

Remarks

Vous pouvez utiliser le paramètre owner pour spécifier un objet particulier, qui implémente l’interface IWin32Window, qui servira de fenêtre de niveau supérieur et de propriétaire de la boîte de dialogue.You can use the owner parameter to specify a particular object, which implements the IWin32Window interface, that will serve as the dialog box's top-level window and owner. Une boîte de message est une boîte de dialogue modale, ce qui signifie qu’aucune entrée (clavier ou clic de souris) ne peut se produire à l’exception des objets du formulaire modal.A message box is a modal dialog box, which means no input (keyboard or mouse click) can occur except to objects on the modal form. Le programme doit masquer ou fermer un formulaire modal (en général, en réponse à une action de l’utilisateur) avant qu’une entrée dans un autre formulaire puisse se produire.The program must hide or close a modal form (typically in response to some user action) before input to another form can occur.

Vous pouvez avoir un maximum de trois boutons sur la boîte de message.You can have a maximum of three buttons on the message box.

See also

• MessageBoxButtons
• MessageBoxIcon

public:
 static System::Windows::Forms::DialogResult Show(System::String ^ text, System::String ^ caption, System::Windows::Forms::MessageBoxButtons buttons, System::Windows::Forms::MessageBoxIcon icon, System::Windows::Forms::MessageBoxDefaultButton defaultButton);

public static System.Windows.Forms.DialogResult Show (string text, string caption, System.Windows.Forms.MessageBoxButtons buttons, System.Windows.Forms.MessageBoxIcon icon, System.Windows.Forms.MessageBoxDefaultButton defaultButton);

static member Show : string * string * System.Windows.Forms.MessageBoxButtons * System.Windows.Forms.MessageBoxIcon * System.Windows.Forms.MessageBoxDefaultButton -> System.Windows.Forms.DialogResult

Public Shared Function Show (text As String, caption As String, buttons As MessageBoxButtons, icon As MessageBoxIcon, defaultButton As MessageBoxDefaultButton) As DialogResult

Parameters

Returns

DialogResult

Une des valeurs DialogResult.One of the DialogResult values.

Exceptions

Examples

L’exemple de code suivant montre comment afficher une MessageBox avec les options prises en charge par cette surcharge de Show.The following code example demonstrates how to display a MessageBox with the options supported by this overload of Show. Après avoir vérifié qu’une variable de chaîne, ServerName, est vide, l’exemple affiche une MessageBox avec une icône de zone de question, offrant à l’utilisateur la possibilité d’annuler l’opération.After verifying that a string variable, ServerName, is empty, the example displays a MessageBox with a question box icon, offering the user the option to cancel the operation. Si la valeur de retour de la méthode Show prend la valeur Yes, le formulaire qui affichait le MessageBox est fermé.If the Show method's return value evaluates to Yes, the form that displayed the MessageBox is closed.

private:
   void validateUserEntry3()
   {
      // Checks the value of the text.
      if ( serverName->Text->Length == 0 )
      {
         // Initializes the variables to pass to the MessageBox::Show method.
         String^ message = "You did not enter a server name. Cancel this operation?";
         String^ caption = "No Server Name Specified";
         MessageBoxButtons buttons = MessageBoxButtons::YesNo;
         System::Windows::Forms::DialogResult result;

         // Displays the MessageBox.
         result = MessageBox::Show( this, message, caption, buttons, MessageBoxIcon::Question, MessageBoxDefaultButton::Button1 );
         if ( result == ::DialogResult::Yes )
         {
            // Closes the parent form.
            this->Close();
         }
      }
   }

private void validateUserEntry3()
{

    // Checks the value of the text.

    if(serverName.Text.Length == 0)
    {

        // Initializes the variables to pass to the MessageBox.Show method.

        string message = "You did not enter a server name. Cancel this operation?";
        string caption = "No Server Name Specified";
        MessageBoxButtons buttons = MessageBoxButtons.YesNo;
        DialogResult result;

        // Displays the MessageBox.

        result = MessageBox.Show(this, message, caption, buttons,
        MessageBoxIcon.Question, MessageBoxDefaultButton.Button1);

        if(result == DialogResult.Yes)
        {

            // Closes the parent form.

            this.Close();
        }
    }
}

Private Sub ValidateUserEntry3()

    ' Checks the value of the text.

    If ServerName.Text.Length = 0 Then

        ' Initializes variables to pass to the MessageBox.Show method.

        Dim Message As String = "You did not enter a server name. Cancel this operation?"
        Dim Caption As String = "No Server Name Specified"
        Dim Buttons As Integer = MessageBoxButtons.YesNo

        Dim Result As DialogResult

        'Displays a MessageBox using the Question icon and specifying the No button as the default.

        Result = MessageBox.Show(Me, Message, Caption, MessageBoxButtons.YesNo, MessageBoxIcon.Question, _
            MessageBoxDefaultButton.Button1)

        ' Gets the result of the MessageBox display.

        If Result = System.Windows.Forms.DialogResult.Yes Then

            ' Closes the parent form.

            Me.Close()

        End If

    End If
End Sub

Remarks

Vous pouvez avoir un maximum de trois boutons sur la boîte de message.You can have a maximum of three buttons on the message box.

See also

• MessageBoxButtons
• MessageBoxIcon
• MessageBoxDefaultButton

public:
 static System::Windows::Forms::DialogResult Show(System::Windows::Forms::IWin32Window ^ owner, System::String ^ text, System::String ^ caption, System::Windows::Forms::MessageBoxButtons buttons);

public static System.Windows.Forms.DialogResult Show (System.Windows.Forms.IWin32Window owner, string text, string caption, System.Windows.Forms.MessageBoxButtons buttons);

static member Show : System.Windows.Forms.IWin32Window * string * string * System.Windows.Forms.MessageBoxButtons -> System.Windows.Forms.DialogResult

Public Shared Function Show (owner As IWin32Window, text As String, caption As String, buttons As MessageBoxButtons) As DialogResult

Parameters

Returns

DialogResult

Une des valeurs DialogResult.One of the DialogResult values.

Exceptions

Examples

L’exemple de code suivant montre comment afficher une MessageBox avec les options prises en charge par cette surcharge de Show.The following code example demonstrates how to display a MessageBox with the options supported by this overload of Show. Après avoir vérifié qu’une variable de chaîne, ServerName, est vide, l’exemple affiche une MessageBox, offrant à l’utilisateur la possibilité d’annuler l’opération.After verifying that a string variable, ServerName, is empty, the example displays a MessageBox, offering the user the option to cancel the operation. Si la valeur de retour de la méthode Show prend la valeur Yes, le formulaire qui affichait le MessageBox est fermé.If the Show method's return value evaluates to Yes, the form that displayed the MessageBox is closed.

private:
   void validateUserEntry5()
   {
      // Checks the value of the text.
      if ( serverName->Text->Length == 0 )
      {
         // Initializes the variables to pass to the MessageBox::Show method.
         String^ message = "You did not enter a server name. Cancel this operation?";
         String^ caption = "No Server Name Specified";
         MessageBoxButtons buttons = MessageBoxButtons::YesNo;
         System::Windows::Forms::DialogResult result;

         // Displays the MessageBox.
         result = MessageBox::Show( this, message, caption, buttons );
         if ( result == ::DialogResult::Yes )
         {
            // Closes the parent form.
            this->Close();
         }
      }
   }

private void validateUserEntry5()
{

    // Checks the value of the text.

    if(serverName.Text.Length == 0)
    {

        // Initializes the variables to pass to the MessageBox.Show method.

        string message = "You did not enter a server name. Cancel this operation?";
        string caption = "No Server Name Specified";
        MessageBoxButtons buttons = MessageBoxButtons.YesNo;
        DialogResult result;

        // Displays the MessageBox.

        result = MessageBox.Show(this, message, caption, buttons);

        if(result == DialogResult.Yes)
        {

            // Closes the parent form.

            this.Close();
        }
    }
}

Private Sub ValidateUserEntry5()

    ' Checks the value of the text.

    If ServerName.Text.Length = 0 Then

        ' Initializes variables to pass to the MessageBox.Show method.

        Dim Message As String = "You did not enter a server name. Cancel this operation?"
        Dim Caption As String = "No Server Name Specified"
        Dim Buttons As Integer = MessageBoxButtons.YesNo

        Dim Result As DialogResult

        'Displays a MessageBox using the Question icon and specifying the No button as the default.

        Result = MessageBox.Show(Me, Message, Caption, MessageBoxButtons.YesNo)

        ' Gets the result of the MessageBox display.

        If Result = System.Windows.Forms.DialogResult.Yes Then

            ' Closes the parent form.

            Me.Close()

        End If

    End If

End Sub

Remarks

Vous pouvez utiliser le paramètre owner pour spécifier un objet particulier, qui implémente l’interface IWin32Window, qui servira de fenêtre de niveau supérieur et de propriétaire de la boîte de dialogue.You can use the owner parameter to specify a particular object, which implements the IWin32Window interface, that will serve as the dialog box's top-level window and owner. Une boîte de message est une boîte de dialogue modale, ce qui signifie qu’aucune entrée (clavier ou clic de souris) ne peut se produire à l’exception des objets du formulaire modal.A message box is a modal dialog box, which means no input (keyboard or mouse click) can occur except to objects on the modal form. Le programme doit masquer ou fermer un formulaire modal (en général, en réponse à une action de l’utilisateur) avant qu’une entrée dans un autre formulaire puisse se produire.The program must hide or close a modal form (typically in response to some user action) before input to another form can occur.

Vous pouvez avoir un maximum de trois boutons sur la boîte de message.You can have a maximum of three buttons on the message box.

See also

• MessageBoxButtons

public:
 static System::Windows::Forms::DialogResult Show(System::String ^ text, System::String ^ caption, System::Windows::Forms::MessageBoxButtons buttons, System::Windows::Forms::MessageBoxIcon icon);

public static System.Windows.Forms.DialogResult Show (string text, string caption, System.Windows.Forms.MessageBoxButtons buttons, System.Windows.Forms.MessageBoxIcon icon);

static member Show : string * string * System.Windows.Forms.MessageBoxButtons * System.Windows.Forms.MessageBoxIcon -> System.Windows.Forms.DialogResult

Public Shared Function Show (text As String, caption As String, buttons As MessageBoxButtons, icon As MessageBoxIcon) As DialogResult

Parameters

Returns

DialogResult

Une des valeurs DialogResult.One of the DialogResult values.

Exceptions

Examples

L’exemple de code suivant illustre l’une des méthodes Show lors de la gestion de l’événement ComboBox.DropDown.The following code example demonstrates one of the Show methods when handling the ComboBox.DropDown event. Pour exécuter l’exemple, collez le code suivant dans un formulaire et appelez la méthode InitializeComboBox à partir du constructeur du formulaire ou de la méthode Load.To run the example, paste the following code in a form and call the InitializeComboBox method from the form's constructor or Load method.

internal:
   // Declare ComboBox1
   System::Windows::Forms::ComboBox^ ComboBox1;

private:
   // Initialize ComboBox1.
   void InitializeComboBox()
   {
      this->ComboBox1 = gcnew ComboBox;
      this->ComboBox1->Location = System::Drawing::Point( 128, 48 );
      this->ComboBox1->Name = "ComboBox1";
      this->ComboBox1->Size = System::Drawing::Size( 100, 21 );
      this->ComboBox1->TabIndex = 0;
      this->ComboBox1->Text = "Typical";
      array<String^>^ installs = {"Typical","Compact","Custom"};
      ComboBox1->Items->AddRange( installs );
      this->Controls->Add( this->ComboBox1 );
      
      // Hook up the event handler.
      this->ComboBox1->DropDown += gcnew System::EventHandler(
         this, &Form1::ComboBox1_DropDown );
   }

   // Handles the ComboBox1 DropDown event. If the user expands the  
   // drop-down box, a message box will appear, recommending the
   // typical installation.
   void ComboBox1_DropDown( Object^ sender, System::EventArgs^ e )
   {
      MessageBox::Show( "Typical installation is strongly recommended.",
         "Install information", MessageBoxButtons::OK,
         MessageBoxIcon::Information );
   }

// Declare ComboBox1.
internal System.Windows.Forms.ComboBox ComboBox1;

// Initialize ComboBox1.
private void InitializeComboBox()
{
    this.ComboBox1 = new ComboBox();
    this.ComboBox1.Location = new System.Drawing.Point(128, 48);
    this.ComboBox1.Name = "ComboBox1";
    this.ComboBox1.Size = new System.Drawing.Size(100, 21);
    this.ComboBox1.TabIndex = 0;
    this.ComboBox1.Text	= "Typical";
    string[] installs = new string[]{"Typical", "Compact", "Custom"};
    ComboBox1.Items.AddRange(installs);
    this.Controls.Add(this.ComboBox1);
    
    // Hook up the event handler.
    this.ComboBox1.DropDown +=  
        new System.EventHandler(ComboBox1_DropDown);
}

// Handles the ComboBox1 DropDown event. If the user expands the  
// drop-down box, a message box will appear, recommending the
// typical installation.
private void ComboBox1_DropDown(object sender, System.EventArgs e)
{
    MessageBox.Show("Typical installation is strongly recommended.", 
    "Install information", MessageBoxButtons.OK, 
        MessageBoxIcon.Information);
}

' Declare ComboBox1.
Friend WithEvents ComboBox1 As System.Windows.Forms.ComboBox

' Initialize ComboBox1.
Private Sub InitializeComboBox()
    Me.ComboBox1 = New ComboBox
    Me.ComboBox1.Location = New System.Drawing.Point(128, 48)
    Me.ComboBox1.Name = "ComboBox1"
    Me.ComboBox1.Size = New System.Drawing.Size(100, 21)
    Me.ComboBox1.TabIndex = 0
    Me.ComboBox1.Text = "Typical"
    Dim installs() As String = New String() _
        {"Typical", "Compact", "Custom"}
    ComboBox1.Items.AddRange(installs)
    Me.Controls.Add(Me.ComboBox1)
End Sub

' Handles the ComboBox1 DropDown event. If the user expands the  
' drop-down box, a message box will appear, recommending the
' typical installation.
Private Sub ComboBox1_DropDown _ 
    (ByVal sender As Object, ByVal e As System.EventArgs) _ 
    Handles ComboBox1.DropDown
    MessageBox.Show("Typical installation is strongly recommended.", _
    "Install information", MessageBoxButtons.OK, MessageBoxIcon.Information)
End Sub

Remarks

Vous pouvez avoir un maximum de trois boutons sur la boîte de message.You can have a maximum of three buttons on the message box.

See also

• MessageBoxButtons
• MessageBoxIcon

public:
 static System::Windows::Forms::DialogResult Show(System::Windows::Forms::IWin32Window ^ owner, System::String ^ text, System::String ^ caption);

public static System.Windows.Forms.DialogResult Show (System.Windows.Forms.IWin32Window owner, string text, string caption);

static member Show : System.Windows.Forms.IWin32Window * string * string -> System.Windows.Forms.DialogResult

Public Shared Function Show (owner As IWin32Window, text As String, caption As String) As DialogResult

Parameters

Returns

DialogResult

Une des valeurs DialogResult.One of the DialogResult values.

Remarks

Vous pouvez utiliser le paramètre owner pour spécifier un objet particulier, qui implémente l’interface IWin32Window, qui servira de fenêtre de niveau supérieur et de propriétaire de la boîte de dialogue.You can use the owner parameter to specify a particular object, which implements the IWin32Window interface, that will serve as the dialog box's top-level window and owner. Une boîte de message est une boîte de dialogue modale, ce qui signifie qu’aucune entrée (clavier ou clic de souris) ne peut se produire à l’exception des objets du formulaire modal.A message box is a modal dialog box, which means no input (keyboard or mouse click) can occur except to objects on the modal form. Le programme doit masquer ou fermer un formulaire modal (en général, en réponse à une action de l’utilisateur) avant qu’une entrée dans un autre formulaire puisse se produire.The program must hide or close a modal form (typically in response to some user action) before input to another form can occur.

Par défaut, la boîte de message affiche un bouton OK .By default, the message box displays an OK button.

public:
 static System::Windows::Forms::DialogResult Show(System::String ^ text, System::String ^ caption, System::Windows::Forms::MessageBoxButtons buttons);

public static System.Windows.Forms.DialogResult Show (string text, string caption, System.Windows.Forms.MessageBoxButtons buttons);

static member Show : string * string * System.Windows.Forms.MessageBoxButtons -> System.Windows.Forms.DialogResult

Public Shared Function Show (text As String, caption As String, buttons As MessageBoxButtons) As DialogResult

Parameters

Returns

DialogResult

Une des valeurs DialogResult.One of the DialogResult values.

Exceptions

Examples

L’exemple de code suivant montre comment afficher une MessageBox avec les options prises en charge par cette surcharge de Show.The following code example demonstrates how to display a MessageBox with the options supported by this overload of Show. Après avoir vérifié qu’une variable de chaîne, ServerName, est vide, l’exemple affiche une MessageBox, offrant à l’utilisateur la possibilité d’annuler l’opération.After verifying that a string variable, ServerName, is empty, the example displays a MessageBox, offering the user the option to cancel the operation. Si la valeur de retour de la méthode Show prend la valeur Yes, le formulaire qui affichait le MessageBox est fermé.If the Show method's return value evaluates to Yes, the form that displayed the MessageBox is closed.

private:
   void validateUserEntry()
   {
      // Checks the value of the text.
      if ( serverName->Text->Length == 0 )
      {
         // Initializes the variables to pass to the MessageBox::Show method.
         String^ message = "You did not enter a server name. Cancel this operation?";
         String^ caption = "No Server Name Specified";
         MessageBoxButtons buttons = MessageBoxButtons::YesNo;
         System::Windows::Forms::DialogResult result;

         // Displays the MessageBox.
         result = MessageBox::Show( this, message, caption, buttons );
         if ( result == ::DialogResult::Yes )
         {
            // Closes the parent form.
            this->Close();
         }
      }
   }

private void validateUserEntry()
{
    // Checks the value of the text.
    if(serverName.Text.Length == 0)
    {
        // Initializes the variables to pass to the MessageBox.Show method.
        string message = "You did not enter a server name. Cancel this operation?";
     string caption = "Error Detected in Input";
        MessageBoxButtons buttons = MessageBoxButtons.YesNo;
        DialogResult result;

        // Displays the MessageBox.
        result = MessageBox.Show(message, caption, buttons);
        if (result == System.Windows.Forms.DialogResult.Yes)
        {
            // Closes the parent form.
            this.Close();
        }
    }
}

Private Sub ValidateUserEntry()
    ' Checks the value of the text.
    If ServerName.Text.Length = 0 Then

        ' Initializes variables to pass to the MessageBox.Show method.
        Dim Message As String = "You did not enter a server name. Cancel this operation?"
        Dim Caption As String = "Error Detected in Input"
        Dim Buttons As MessageBoxButtons = MessageBoxButtons.YesNo

        Dim Result As DialogResult

        'Displays the MessageBox
        Result = MessageBox.Show(Message, Caption, Buttons)

        ' Gets the result of the MessageBox display.
        If Result = System.Windows.Forms.DialogResult.Yes Then
            ' Closes the parent form.
            Me.Close()
        End If
    End If
End Sub

Remarks

Vous pouvez avoir un maximum de trois boutons sur la boîte de message.You can have a maximum of three buttons on the message box.

See also

• MessageBoxButtons

public:
 static System::Windows::Forms::DialogResult Show(System::Windows::Forms::IWin32Window ^ owner, System::String ^ text);

public static System.Windows.Forms.DialogResult Show (System.Windows.Forms.IWin32Window owner, string text);

static member Show : System.Windows.Forms.IWin32Window * string -> System.Windows.Forms.DialogResult

Public Shared Function Show (owner As IWin32Window, text As String) As DialogResult

Parameters

Returns

DialogResult

Une des valeurs DialogResult.One of the DialogResult values.

Remarks

Vous pouvez utiliser le paramètre owner pour spécifier un objet particulier, qui implémente l’interface IWin32Window, qui servira de fenêtre de niveau supérieur et de propriétaire de la boîte de dialogue.You can use the owner parameter to specify a particular object, which implements the IWin32Window interface, that will serve as the dialog box's top-level window and owner. Une boîte de message est une boîte de dialogue modale, ce qui signifie qu’aucune entrée (clavier ou clic de souris) ne peut se produire à l’exception des objets du formulaire modal.A message box is a modal dialog box, which means no input (keyboard or mouse click) can occur except to objects on the modal form. Le programme doit masquer ou fermer un formulaire modal (en général, en réponse à une action de l’utilisateur) avant qu’une entrée dans un autre formulaire puisse se produire.The program must hide or close a modal form (typically in response to some user action) before input to another form can occur.

Par défaut, la boîte de message affiche un bouton OK .By default, the message box displays an OK button. La boîte de message ne contient pas de légende dans le titre.The message box does not contain a caption in the title.

public:
 static System::Windows::Forms::DialogResult Show(System::String ^ text, System::String ^ caption);

public static System.Windows.Forms.DialogResult Show (string text, string caption);

static member Show : string * string -> System.Windows.Forms.DialogResult

Public Shared Function Show (text As String, caption As String) As DialogResult

Parameters

Returns

DialogResult

Une des valeurs DialogResult.One of the DialogResult values.

Remarks

Par défaut, la boîte de message affiche un bouton OK .By default, the message box displays an OK button.

public:
 static System::Windows::Forms::DialogResult Show(System::String ^ text, System::String ^ caption, System::Windows::Forms::MessageBoxButtons buttons, System::Windows::Forms::MessageBoxIcon icon, System::Windows::Forms::MessageBoxDefaultButton defaultButton, System::Windows::Forms::MessageBoxOptions options);

public static System.Windows.Forms.DialogResult Show (string text, string caption, System.Windows.Forms.MessageBoxButtons buttons, System.Windows.Forms.MessageBoxIcon icon, System.Windows.Forms.MessageBoxDefaultButton defaultButton, System.Windows.Forms.MessageBoxOptions options);

static member Show : string * string * System.Windows.Forms.MessageBoxButtons * System.Windows.Forms.MessageBoxIcon * System.Windows.Forms.MessageBoxDefaultButton * System.Windows.Forms.MessageBoxOptions -> System.Windows.Forms.DialogResult

Public Shared Function Show (text As String, caption As String, buttons As MessageBoxButtons, icon As MessageBoxIcon, defaultButton As MessageBoxDefaultButton, options As MessageBoxOptions) As DialogResult

Parameters

Returns

DialogResult

Une des valeurs DialogResult.One of the DialogResult values.

Exceptions

Examples

L’exemple de code suivant montre comment afficher une MessageBox avec les options prises en charge par cette surcharge de Show.The following code example demonstrates how to display a MessageBox with the options supported by this overload of Show. Après avoir vérifié qu’une variable de chaîne, ServerName, est vide, l’exemple affiche une MessageBox avec une icône de zone de question, offrant à l’utilisateur la possibilité d’annuler l’opération.After verifying that a string variable, ServerName, is empty, the example displays a MessageBox with a question box icon, offering the user the option to cancel the operation. L’exemple utilise le membre RightAlign de l’énumération MessageBoxOptions pour aligner le texte sur le bord droit de la boîte de dialogue.The example uses the RightAlign member of the MessageBoxOptions enumeration to align the text to the right edge of the dialog box. Si la valeur de retour de la méthode Show prend la valeur Yes, le formulaire qui affichait le MessageBox est fermé.If the Show method's return value evaluates to Yes, the form that displayed the MessageBox is closed.

private:
   void validateUserEntry2()
   {
      // Checks the value of the text.
      if ( serverName->Text->Length == 0 )
      {
         // Initializes the variables to pass to the MessageBox::Show method.
         String^ message = "You did not enter a server name. Cancel this operation?";
         String^ caption = "No Server Name Specified";
         MessageBoxButtons buttons = MessageBoxButtons::YesNo;
         System::Windows::Forms::DialogResult result;
         
         // Displays the MessageBox.
         result = MessageBox::Show( this, message, caption, buttons, MessageBoxIcon::Question, MessageBoxDefaultButton::Button1, MessageBoxOptions::RightAlign );
         if ( result == ::DialogResult::Yes )
         {
            // Closes the parent form.
            this->Close();
         }
      }
   }

private void validateUserEntry2()
{

    // Checks the value of the text.

    if(serverName.Text.Length == 0)
    {

        // Initializes the variables to pass to the MessageBox.Show method.

        string message = "You did not enter a server name. Cancel this operation?";
        string caption = "No Server Name Specified";
        MessageBoxButtons buttons = MessageBoxButtons.YesNo;
        DialogResult result;

        // Displays the MessageBox.

        result = MessageBox.Show(this, message, caption, buttons,
            MessageBoxIcon.Question, MessageBoxDefaultButton.Button1, 
            MessageBoxOptions.RightAlign);

        if(result == DialogResult.Yes)
        {

            // Closes the parent form.

            this.Close();
        }
    }
}

Private Sub ValidateUserEntry2()


    ' Checks the value of the text.

    If ServerName.Text.Length = 0 Then

        ' Initializes variables to pass to the MessageBox.Show method.

        Dim Message As String = "You did not enter a server name. Cancel this operation?"
        Dim Caption As String = "No Server Name Specified"
        Dim Buttons As Integer = MessageBoxButtons.YesNo

        Dim Result As DialogResult

        'Displays a MessageBox using the Question icon and specifying the No button as the default.

        Result = MessageBox.Show(Me, Message, Caption, MessageBoxButtons.YesNo, _
            MessageBoxIcon.Question, MessageBoxDefaultButton.Button1, MessageBoxOptions.RightAlign)


        ' Gets the result of the MessageBox display.

        If Result = System.Windows.Forms.DialogResult.Yes Then

            ' Closes the parent form.

            Me.Close()

        End If

    End If

End Sub

Remarks

Vous pouvez avoir un maximum de trois boutons sur la boîte de message.You can have a maximum of three buttons on the message box.

See also

• MessageBoxButtons
• MessageBoxIcon
• MessageBoxDefaultButton
• MessageBoxOptions

public:
 static System::Windows::Forms::DialogResult Show(System::Windows::Forms::IWin32Window ^ owner, System::String ^ text, System::String ^ caption, System::Windows::Forms::MessageBoxButtons buttons, System::Windows::Forms::MessageBoxIcon icon, System::Windows::Forms::MessageBoxDefaultButton defaultButton, System::Windows::Forms::MessageBoxOptions options, System::String ^ helpFilePath, System::Windows::Forms::HelpNavigator navigator, System::Object ^ param);

public static System.Windows.Forms.DialogResult Show (System.Windows.Forms.IWin32Window owner, string text, string caption, System.Windows.Forms.MessageBoxButtons buttons, System.Windows.Forms.MessageBoxIcon icon, System.Windows.Forms.MessageBoxDefaultButton defaultButton, System.Windows.Forms.MessageBoxOptions options, string helpFilePath, System.Windows.Forms.HelpNavigator navigator, object param);

static member Show : System.Windows.Forms.IWin32Window * string * string * System.Windows.Forms.MessageBoxButtons * System.Windows.Forms.MessageBoxIcon * System.Windows.Forms.MessageBoxDefaultButton * System.Windows.Forms.MessageBoxOptions * string * System.Windows.Forms.HelpNavigator * obj -> System.Windows.Forms.DialogResult

Public Shared Function Show (owner As IWin32Window, text As String, caption As String, buttons As MessageBoxButtons, icon As MessageBoxIcon, defaultButton As MessageBoxDefaultButton, options As MessageBoxOptions, helpFilePath As String, navigator As HelpNavigator, param As Object) As DialogResult

Parameters

Returns

DialogResult

Une des valeurs DialogResult.One of the DialogResult values.

Exceptions

Examples

L’exemple de code suivant montre comment afficher une boîte de message apparenté à la fenêtre principale.The following code example demonstrates how to show a message box parented to the main window. La boîte de message affiche un bouton aide.The message box displays a Help button. Quand l’utilisateur clique sur le bouton aide, le fichier d’aide Mspaint.chm s’ouvre et l’onglet Index de l’aide et la rubrique identifiée par le mot clé ovals s’affichent.When the user clicks the Help button, the Mspaint.chm Help file is opened and the Help index tab and the topic identified by the ovals keyword are displayed. L’exemple requiert l’installation du fichier d’aide Mspaint.chm.The example requires that the Mspaint.chm Help file is installed.

#using <System.dll>
#using <System.Windows.Forms.dll>
#using <System.Drawing.dll>

using namespace System;
using namespace System::Drawing;
using namespace System::ComponentModel;
using namespace System::Windows::Forms;

using System;
using System.Drawing;
using System.ComponentModel;
using System.Windows.Forms;

Imports System.Drawing
Imports System.ComponentModel
Imports System.Windows.Forms

// Display message box parented to the main form. 
// The Help button opens the Mspaint.chm Help file, 
// shows index with the "ovals" keyword selected, and displays the
// associated topic.
System::Windows::Forms::DialogResult r6 = MessageBox::Show( this, "Message with Help file and Help navigator with additional parameter.", "Help Caption", MessageBoxButtons::OK, MessageBoxIcon::Question, MessageBoxDefaultButton::Button1, (MessageBoxOptions)0, "mspaint.chm", HelpNavigator::KeywordIndex, "ovals" );

// Display message box parented to the main form. 
// The Help button opens the Mspaint.chm Help file, 
// shows index with the "ovals" keyword selected, and displays the
// associated topic.
DialogResult r6 = MessageBox.Show (this, 
                                   "Message with Help file and Help navigator with additional parameter.", 
                                   "Help Caption", MessageBoxButtons.OK, 
                                   MessageBoxIcon.Question, 
                                   MessageBoxDefaultButton.Button1, 
                                   0, "mspaint.chm", 
                                   HelpNavigator.KeywordIndex, "ovals");

' Display message box parented to the main form. 
' The Help button opens the Mspaint.chm Help file, 
' shows index with the "ovals" keyword selected, and displays the
' associated topic.
Dim r6 As DialogResult = MessageBox.Show(Me, _
                                   "Message with Help file and Help navigator with additional parameter.", _
                                   "Help Caption", MessageBoxButtons.OK, _
                                   MessageBoxIcon.Question, _
                                   MessageBoxDefaultButton.Button1, _
                                   0, "mspaint.chm", _
                                   HelpNavigator.KeywordIndex, "ovals")

Remarks

Une boîte de message est une boîte de dialogue modale, ce qui signifie qu’aucune entrée (clavier ou clic de souris) ne peut se produire à l’exception des objets du formulaire modal.A message box is a modal dialog box, which means no input (keyboard or mouse click) can occur except to objects on the modal form. Le programme doit masquer ou fermer un formulaire modal (en général, en réponse à une action de l’utilisateur) avant qu’une entrée dans un autre formulaire puisse se produire.The program must hide or close a modal form (typically in response to some user action) before input to another form can occur. Vous pouvez utiliser le paramètre owner pour spécifier un objet particulier, qui implémente l’interface IWin32Window, qui servira de fenêtre de niveau supérieur et de propriétaire de la boîte de dialogue.You can use the owner parameter to specify a particular object, which implements the IWin32Window interface, that will serve as the dialog box's top-level window and owner.

Quand l’utilisateur clique sur le bouton aide, le fichier d’aide spécifié dans le paramètre helpFilePath s’ouvre et le contenu d’aide identifié par le paramètre navigator s’affiche.When the user clicks the Help button, the Help file specified in the helpFilePath parameter is opened and the Help content identified by the navigator parameter is displayed. Le formulaire qui possède la boîte de message (ou le formulaire actif) reçoit également l’événement HelpRequested.The form that owns the message box (or the active form) also receives the HelpRequested event.

Les fichiers d’aide compilés fournissent des tables de matières, d’index, de recherche et de mots clés dans les pages.Compiled help files provide table of contents, index, search, and keyword links in pages. Vous pouvez utiliser les valeurs suivantes pour navigator: TableOfContents, Find, Indexou Topic.You can use the following values for navigator: TableOfContents, Find, Index, or Topic.

Vous pouvez utiliser param pour affiner la commande Topic.You can use param to provide further refinement of the Topic command. Si la valeur spécifiée dans le paramètre navigator est TableOfContents, Indexou Find, cette valeur doit être null.If the value specified in the navigator parameter is TableOfContents, Index, or Find, this value should be null. Si le paramètre navigator référence Topic, cette valeur doit faire référence à un objet qui contient la valeur numérique de la rubrique à afficher.If the navigator parameter references Topic, this value should reference an object that contains the numeric value of the topic to display.

Le paramètre helpFilePath peut être de la forme "C:\path\sample.chm" ou/folder/file.htm.The helpFilePath parameter can be of the form C:\path\sample.chm or /folder/file.htm.

See also

• MessageBoxButtons
• MessageBoxIcon
• MessageBoxDefaultButton
• MessageBoxOptions