Application.Run Application.Run Application.Run Application.Run Method

Definição

Inicia a execução de um loop de mensagens do aplicativo padrão no thread atual. Begins running a standard application message loop on the current thread.

Sobrecargas

Run() Run() Run() Run()

Inicia a execução de um loop de mensagens do aplicativo padrão no thread atual, sem nenhum formulário. Begins running a standard application message loop on the current thread, without a form.

Run(ApplicationContext) Run(ApplicationContext) Run(ApplicationContext) Run(ApplicationContext)

Inicia a execução de um loop de mensagens do aplicativo padrão no thread atual, com um ApplicationContext. Begins running a standard application message loop on the current thread, with an ApplicationContext.

Run(Form) Run(Form) Run(Form) Run(Form)

Começa a executar um loop de mensagem do aplicativo padrão no thread atual e torna o formulário especificado visível. Begins running a standard application message loop on the current thread, and makes the specified form visible.

Run() Run() Run() Run()

Inicia a execução de um loop de mensagens do aplicativo padrão no thread atual, sem nenhum formulário. Begins running a standard application message loop on the current thread, without a form.

public:
 static void Run();
public static void Run ();
static member Run : unit -> unit
Public Shared Sub Run ()
Exceções

Um loop de mensagem principal já está em execução nesse thread. A main message loop is already running on this thread.

Comentários

Em um baseado em Win32 ou formulários do Windows é de um loop de mensagem de aplicativo, uma rotina no código que processa eventos de usuário, como cliques do mouse e teclas digitadas.In a Win32-based or Windows Forms application, a message loop is a routine in code that processes user events, such as mouse clicks and keyboard strokes. Todos os aplicativos em execução com base em Windows requer um loop de mensagens ativas, chamado do loop de mensagem principal.Every running Windows-based application requires an active message loop, called the main message loop. Quando o loop de mensagem principal for fechado, o aplicativo é encerrado.When the main message loop is closed, the application exits. No Windows Forms, este loop é fechado quando o Exit método é chamado, ou quando o ExitThread método é chamado no thread que está executando o loop de mensagem principal.In Windows Forms, this loop is closed when the Exit method is called, or when the ExitThread method is called on the thread that is running the main message loop.

A maioria dos desenvolvedores de formulários do Windows não precisará usar essa versão do método.Most Windows Forms developers will not need to use this version of the method. Você deve usar o Run(Form) sobrecarga para iniciar um aplicativo com um formulário principal, para que o aplicativo é encerrado quando o formulário principal é fechado.You should use the Run(Form) overload to start an application with a main form, so that the application terminates when the main form is closed. Para todas as outras situações, use o Run(ApplicationContext) sobrecarregar, que dá suporte ao fornecimento de um ApplicationContext objeto para um melhor controle sobre o tempo de vida do aplicativo.For all other situations, use the Run(ApplicationContext) overload, which supports supplying an ApplicationContext object for better control over the lifetime of the application.

Veja também

Run(ApplicationContext) Run(ApplicationContext) Run(ApplicationContext) Run(ApplicationContext)

Inicia a execução de um loop de mensagens do aplicativo padrão no thread atual, com um ApplicationContext. Begins running a standard application message loop on the current thread, with an ApplicationContext.

public:
 static void Run(System::Windows::Forms::ApplicationContext ^ context);
public static void Run (System.Windows.Forms.ApplicationContext context);
static member Run : System.Windows.Forms.ApplicationContext -> unit
Public Shared Sub Run (context As ApplicationContext)
Parâmetros
context
ApplicationContext ApplicationContext ApplicationContext ApplicationContext

Um ApplicationContext no qual o aplicativo é executado. An ApplicationContext in which the application is run.

Exceções

Um loop de mensagem principal já está em execução nesse thread. A main message loop is already running on this thread.

Exemplos

O exemplo exibe dois formulários e sai do aplicativo quando ambas as formas são fechadas.The example displays two forms and exits the application when both forms are closed. Quando o aplicativo é iniciado e é encerrado, a posição de cada formulário será lembrada.When the application starts and exits, the position of each form is remembered. Este exemplo demonstra como usar um ApplicationContext, juntamente com o Application.Run(context) método para exibir vários formulários, quando o aplicativo é iniciado.This example demonstrates how to use an ApplicationContext, along with the Application.Run(context) method, to display multiple forms when the application starts.

A classe MyApplicationContext herda de ApplicationContext e mantém o controle quando cada formulário é fechado e sai do thread atual quando ambos estiverem.The class MyApplicationContext inherits from ApplicationContext and keeps track when each form is closed, and exits the current thread when they both are. A classe armazena as posições de cada formulário do usuário.The class stores the positions of each form for the user. Os dados de posição do formulário são armazenados em um arquivo intitulado Appdata.txt que é criado no local determinado pelo UserAppDataPath.The form position data is stored in a file titled Appdata.txt that is created in the location determined by UserAppDataPath. O Main chamadas de método Application.Run(context) para iniciar o aplicativo, dado o ApplicationContext.The Main method calls Application.Run(context) to start the application given the ApplicationContext.

O código para o AppForm1 e AppForm2 formulários não é mostrada para fins de brevidade.The code for the AppForm1 and AppForm2 forms is not shown for the purpose of brevity. Consulte o ApplicationContext visão geral da classe para a listagem de código inteiro.See the ApplicationContext class overview for the whole code listing.

// The class that handles the creation of the application windows
ref class MyApplicationContext: public ApplicationContext
{
private:
   int formCount;
   AppForm1^ form1;
   AppForm2^ form2;
   System::Drawing::Rectangle form1Position;
   System::Drawing::Rectangle form2Position;
   FileStream^ userData;

public:

   MyApplicationContext()
   {
      formCount = 0;
      
      // Handle the ApplicationExit event to know when the application is exiting.
      Application::ApplicationExit += gcnew EventHandler( this, &MyApplicationContext::OnApplicationExit );
      try
      {
         
         // Create a file that the application will store user specific data in.
         userData = gcnew FileStream( String::Concat( Application::UserAppDataPath, "\\appdata.txt" ),FileMode::OpenOrCreate );
      }
      catch ( IOException^ e ) 
      {
         
         // Inform the user that an error occurred.
         MessageBox::Show( "An error occurred while attempting to show the application. The error is: {0}", dynamic_cast<String^>(e) );
         
         // Exit the current thread instead of showing the windows.
         ExitThread();
      }

      
      // Create both application forms and handle the Closed event
      // to know when both forms are closed.
      form1 = gcnew AppForm1;
      form1->Closed += gcnew EventHandler( this, &MyApplicationContext::OnFormClosed );
      form1->Closing += gcnew CancelEventHandler( this, &MyApplicationContext::OnFormClosing );
      formCount++;
      form2 = gcnew AppForm2;
      form2->Closed += gcnew EventHandler( this, &MyApplicationContext::OnFormClosed );
      form2->Closing += gcnew CancelEventHandler( this, &MyApplicationContext::OnFormClosing );
      formCount++;
      
      // Get the form positions based upon the user specific data.
      if ( ReadFormDataFromFile() )
      {
         
         // If the data was read from the file, set the form
         // positions manually.
         form1->StartPosition = FormStartPosition::Manual;
         form2->StartPosition = FormStartPosition::Manual;
         form1->Bounds = form1Position;
         form2->Bounds = form2Position;
      }

      
      // Show both forms.
      form1->Show();
      form2->Show();
   }

   void OnApplicationExit( Object^ /*sender*/, EventArgs^ /*e*/ )
   {
      
      // When the application is exiting, write the application data to the
      // user file and close it.
      WriteFormDataToFile();
      try
      {
         
         // Ignore any errors that might occur while closing the file handle.
         userData->Close();
      }
      catch ( Exception^ ) 
      {
      }

   }


private:

   void OnFormClosing( Object^ sender, CancelEventArgs^ /*e*/ )
   {
      
      // When a form is closing, remember the form position so it
      // can be saved in the user data file.
      if ( dynamic_cast<AppForm1^>(sender) != nullptr )
            form1Position = (dynamic_cast<Form^>(sender))->Bounds;
      else
      if ( dynamic_cast<AppForm1^>(sender) != nullptr )
            form2Position = (dynamic_cast<Form^>(sender))->Bounds;
   }


   void OnFormClosed( Object^ /*sender*/, EventArgs^ /*e*/ )
   {
      
      // When a form is closed, decrement the count of open forms.
      // When the count gets to 0, exit the app by calling
      // ExitThread().
      formCount--;
      if ( formCount == 0 )
      {
         ExitThread();
      }
   }


   bool WriteFormDataToFile()
   {
      
      // Write the form positions to the file.
      UTF8Encoding^ encoding = gcnew UTF8Encoding;
      RectangleConverter^ rectConv = gcnew RectangleConverter;
      String^ form1pos = rectConv->ConvertToString( form1Position );
      String^ form2pos = rectConv->ConvertToString( form2Position );
      array<Byte>^dataToWrite = encoding->GetBytes( String::Concat( "~", form1pos, "~", form2pos ) );
      try
      {
         
         // Set the write position to the start of the file and write
         userData->Seek( 0, SeekOrigin::Begin );
         userData->Write( dataToWrite, 0, dataToWrite->Length );
         userData->Flush();
         userData->SetLength( dataToWrite->Length );
         return true;
      }
      catch ( Exception^ ) 
      {
         
         // An error occurred while attempting to write, return false.
         return false;
      }

   }

   bool ReadFormDataFromFile()
   {
      
      // Read the form positions from the file.
      UTF8Encoding^ encoding = gcnew UTF8Encoding;
      String^ data;
      if ( userData->Length != 0 )
      {
         array<Byte>^dataToRead = gcnew array<Byte>(userData->Length);
         try
         {
            
            // Set the read position to the start of the file and read.
            userData->Seek( 0, SeekOrigin::Begin );
            userData->Read( dataToRead, 0, dataToRead->Length );
         }
         catch ( IOException^ e ) 
         {
            String^ errorInfo = dynamic_cast<String^>(e);
            
            // An error occurred while attempt to read, return false.
            return false;
         }

         
         // Parse out the data to get the window rectangles
         data = encoding->GetString( dataToRead );
         try
         {
            
            // Convert the String* data to rectangles
            RectangleConverter^ rectConv = gcnew RectangleConverter;
            String^ form1pos = data->Substring( 1, data->IndexOf( "~", 1 ) - 1 );
            form1Position =  *safe_cast<Rectangle^>(rectConv->ConvertFromString( form1pos ));
            String^ form2pos = data->Substring( data->IndexOf( "~", 1 ) + 1 );
            form2Position =  *safe_cast<Rectangle^>(rectConv->ConvertFromString( form2pos ));
            return true;
         }
         catch ( Exception^ ) 
         {
            
            // Error occurred while attempting to convert the rectangle data.
            // Return false to use default values.
            return false;
         }

      }
      else
      {
         
         // No data in the file, return false to use default values.
         return false;
      }
   }

};


// The class that handles the creation of the application windows
class MyApplicationContext : ApplicationContext {

    private int formCount;
    private AppForm1 form1;
    private AppForm2 form2;

    private Rectangle form1Position;
    private Rectangle form2Position;

    private FileStream userData;

    private MyApplicationContext() {
        formCount = 0;

        // Handle the ApplicationExit event to know when the application is exiting.
        Application.ApplicationExit += new EventHandler(this.OnApplicationExit);

        try {
            // Create a file that the application will store user specific data in.
            userData = new FileStream(Application.UserAppDataPath + "\\appdata.txt", FileMode.OpenOrCreate);

        } catch(IOException e) {
            // Inform the user that an error occurred.
            MessageBox.Show("An error occurred while attempting to show the application." + 
                            "The error is:" + e.ToString());

            // Exit the current thread instead of showing the windows.
            ExitThread();
        }

        // Create both application forms and handle the Closed event
        // to know when both forms are closed.
        form1 = new AppForm1();
        form1.Closed += new EventHandler(OnFormClosed);            
        form1.Closing += new CancelEventHandler(OnFormClosing);            
        formCount++;

        form2 = new AppForm2();
        form2.Closed += new EventHandler(OnFormClosed);            
        form2.Closing += new CancelEventHandler(OnFormClosing);            
        formCount++;

        // Get the form positions based upon the user specific data.
        if (ReadFormDataFromFile()) {
            // If the data was read from the file, set the form
            // positions manually.
            form1.StartPosition = FormStartPosition.Manual;
            form2.StartPosition = FormStartPosition.Manual;
            
            form1.Bounds = form1Position;
            form2.Bounds = form2Position;
        }

        // Show both forms.
        form1.Show();
        form2.Show();
    }

    private void OnApplicationExit(object sender, EventArgs e) {
        // When the application is exiting, write the application data to the
        // user file and close it.
        WriteFormDataToFile();

        try {
            // Ignore any errors that might occur while closing the file handle.
            userData.Close();
        } catch {}
    }

    private void OnFormClosing(object sender, CancelEventArgs e) {
        // When a form is closing, remember the form position so it
        // can be saved in the user data file.
        if (sender is AppForm1) 
            form1Position = ((Form)sender).Bounds;
        else if (sender is AppForm2)
            form2Position = ((Form)sender).Bounds;
    }

    private void OnFormClosed(object sender, EventArgs e) {
        // When a form is closed, decrement the count of open forms.

        // When the count gets to 0, exit the app by calling
        // ExitThread().
        formCount--;
        if (formCount == 0) {
            ExitThread();
        }
    }

    private bool WriteFormDataToFile(){
        // Write the form positions to the file.
        UTF8Encoding encoding = new UTF8Encoding();

        RectangleConverter rectConv = new RectangleConverter();
        String form1pos = rectConv.ConvertToString(form1Position);
        String form2pos = rectConv.ConvertToString(form2Position);

        byte[] dataToWrite = encoding.GetBytes("~" + form1pos + "~" + form2pos);

        try {
            // Set the write position to the start of the file and write
            userData.Seek(0,SeekOrigin.Begin);
            userData.Write(dataToWrite, 0, dataToWrite.Length);
            userData.Flush();

            userData.SetLength(dataToWrite.Length);
            return true;

        } catch {
            // An error occurred while attempting to write, return false.
            return false;
        }

    }

    private bool ReadFormDataFromFile(){
        // Read the form positions from the file.
        UTF8Encoding encoding = new UTF8Encoding();
        String data;

        if (userData.Length != 0) {
            byte[] dataToRead = new Byte[userData.Length];

            try {
                // Set the read position to the start of the file and read.
                userData.Seek(0, SeekOrigin.Begin);
                userData.Read(dataToRead, 0, dataToRead.Length);

            } catch (IOException e) {
                String errorInfo = e.ToString();
                // An error occurred while attempt to read, return false.
                return false;
            }

            // Parse out the data to get the window rectangles
            data = encoding.GetString(dataToRead);

            try {
                // Convert the string data to rectangles
                RectangleConverter rectConv = new RectangleConverter();
                String form1pos = data.Substring(1,data.IndexOf("~",1)-1);

                form1Position = (Rectangle)rectConv.ConvertFromString(form1pos);

                String form2pos = data.Substring(data.IndexOf("~",1)+1);
                form2Position = (Rectangle)rectConv.ConvertFromString(form2pos);

                return true;

            } catch {
                // Error occurred while attempting to convert the rectangle data.
                // Return false to use default values.
                return false;
            }

        } else {
            // No data in the file, return false to use default values.
            return false;
        }
    }        
    
    [STAThread]
    static void Main(string[] args) {
        
        // Create the MyApplicationContext, that derives from ApplicationContext,
        // that manages when the application should exit.

        MyApplicationContext context = new MyApplicationContext();

        // Run the application with the specific context. It will exit when
        // all forms are closed.
        Application.Run(context);

    }
}
' The class that handles the creation of the application windows
Public Class MyApplicationContext
    Inherits ApplicationContext

    Private formCount As Integer
    Private form1 As AppForm1
    Private form2 As AppForm2

    Private form1Position As Rectangle
    Private form2Position As Rectangle

    Private userData As FileStream

    Public Sub New()
        MyBase.New()
        formCount = 0

        ' Handle the ApplicationExit event to know when the application is exiting.
        AddHandler Application.ApplicationExit, AddressOf OnApplicationExit

        Try
            ' Create a file that the application will store user specific data in.
            userData = New FileStream(Application.UserAppDataPath + "\appdata.txt", FileMode.OpenOrCreate)

        Catch e As IOException
            ' Inform the user that an error occurred.
            MessageBox.Show("An error occurred while attempting to show the application." + _
                            "The error is:" + e.ToString())

            ' Exit the current thread instead of showing the windows.
            ExitThread()
        End Try

        ' Create both application forms and handle the Closed event
        ' to know when both forms are closed.
        form1 = New AppForm1()
        AddHandler form1.Closed, AddressOf OnFormClosed
        AddHandler form1.Closing, AddressOf OnFormClosing
        formCount = formCount + 1

        form2 = New AppForm2()
        AddHandler form2.Closed, AddressOf OnFormClosed
        AddHandler form2.Closing, AddressOf OnFormClosing
        formCount = formCount + 1

        ' Get the form positions based upon the user specific data.
        If (ReadFormDataFromFile()) Then
            ' If the data was read from the file, set the form
            ' positions manually.
            form1.StartPosition = FormStartPosition.Manual
            form2.StartPosition = FormStartPosition.Manual

            form1.Bounds = form1Position
            form2.Bounds = form2Position
        End If

        ' Show both forms.
        form1.Show()
        form2.Show()
    End Sub

    Private Sub OnApplicationExit(ByVal sender As Object, ByVal e As EventArgs)
        ' When the application is exiting, write the application data to the
        ' user file and close it.
        WriteFormDataToFile()

        Try
            ' Ignore any errors that might occur while closing the file handle.
            userData.Close()
        Catch
        End Try
    End Sub

    Private Sub OnFormClosing(ByVal sender As Object, ByVal e As CancelEventArgs)
        ' When a form is closing, remember the form position so it
        ' can be saved in the user data file.
        If TypeOf sender Is AppForm1 Then
            form1Position = CType(sender, Form).Bounds
        ElseIf TypeOf sender Is AppForm2 Then
            form2Position = CType(sender, Form).Bounds
        End If
    End Sub
    
    Private Sub OnFormClosed(ByVal sender As Object, ByVal e As EventArgs)
        ' When a form is closed, decrement the count of open forms.

        ' When the count gets to 0, exit the app by calling
        ' ExitThread().
        formCount = formCount - 1
        If (formCount = 0) Then
            ExitThread()
        End If
    End Sub

    Private Function WriteFormDataToFile() As Boolean
        ' Write the form positions to the file.
        Dim encoding As UTF8Encoding = New UTF8Encoding()

        Dim rectConv As RectangleConverter = New RectangleConverter()
        Dim form1pos As String = rectConv.ConvertToString(form1Position)
        Dim form2pos As String = rectConv.ConvertToString(form2Position)

        Dim dataToWrite As Byte() = encoding.GetBytes("~" + form1pos + "~" + form2pos)

        Try
            ' Set the write position to the start of the file and write
            userData.Seek(0, SeekOrigin.Begin)
            userData.Write(dataToWrite, 0, dataToWrite.Length)
            userData.Flush()

            userData.SetLength(dataToWrite.Length)
            Return True

        Catch
            ' An error occurred while attempting to write, return false.
            Return False
        End Try

    End Function

    Private Function ReadFormDataFromFile() As Boolean
        ' Read the form positions from the file.
        Dim encoding As UTF8Encoding = New UTF8Encoding()
        Dim data As String

        If (userData.Length <> 0) Then
            Dim dataToRead(userData.Length) As Byte

            Try
                ' Set the read position to the start of the file and read.
                userData.Seek(0, SeekOrigin.Begin)
                userData.Read(dataToRead, 0, dataToRead.Length)

            Catch e As IOException
                Dim errorInfo As String = e.ToString()
                ' An error occurred while attempt to read, return false.
                Return False
            End Try

            ' Parse out the data to get the window rectangles
            data = encoding.GetString(dataToRead)

            Try
                ' Convert the string data to rectangles
                Dim rectConv As RectangleConverter = New RectangleConverter()
                Dim form1pos As String = data.Substring(1, data.IndexOf("~", 1) - 1)

                form1Position = CType(rectConv.ConvertFromString(form1pos), Rectangle)

                Dim form2pos As String = data.Substring(data.IndexOf("~", 1) + 1)
                form2Position = CType(rectConv.ConvertFromString(form2pos), Rectangle)

                Return True

            Catch
                ' Error occurred while attempting to convert the rectangle data.
                ' Return false to use default values.
                Return False
            End Try

        Else
            ' No data in the file, return false to use default values.
            Return False
        End If
    End Function

End Class

Public Module MyApplication
    Public Sub Main()
        ' Create the MyApplicationContext, that derives from ApplicationContext,
        ' that manages when the application should exit.

        Dim context As MyApplicationContext = New MyApplicationContext()

        ' Run the application with the specific context. It will exit when
        ' all forms are closed.
        Application.Run(context)
    End Sub
End Module

Comentários

O loop de mensagens é executado até Exit ou ExitThread é chamado ou o ThreadExit é gerado no objeto de contexto.The message loop runs until Exit or ExitThread is called or the ThreadExit event is raised on the context object.

Veja também

Run(Form) Run(Form) Run(Form) Run(Form)

Começa a executar um loop de mensagem do aplicativo padrão no thread atual e torna o formulário especificado visível. Begins running a standard application message loop on the current thread, and makes the specified form visible.

public:
 static void Run(System::Windows::Forms::Form ^ mainForm);
public static void Run (System.Windows.Forms.Form mainForm);
static member Run : System.Windows.Forms.Form -> unit
Public Shared Sub Run (mainForm As Form)
Parâmetros
mainForm
Form Form Form Form

Um Form que representa o formulário para tornar visível. A Form that represents the form to make visible.

Exceções

Um loop de mensagem principal já está em execução no thread atual. A main message loop is already running on the current thread.

Exemplos

O exemplo de código a seguir lista os números em uma caixa de listagem em um formulário.The following code example lists numbers in a list box on a form. Cada vez que você clicar button1, o aplicativo adiciona outro número à lista.Each time you click button1, the application adds another number to the list.

O Main chamadas de método Run para iniciar o aplicativo, que cria o formulário, listBox1, e button1.The Main method calls Run to start the application, which creates the form, listBox1, and button1. Quando o usuário clica button1, o button1_Click método adiciona um a três à caixa de listagem de números e exibe um MessageBox.When the user clicks button1, the button1_Click method adds numbers one to three to the list box, and displays a MessageBox. Se o usuário clica não sobre o MessageBox, o button1_Click método adiciona outro número para a lista.If the user clicks No on the MessageBox, the button1_Click method adds another number to the list. Se o usuário clica Sim, o aplicativo chama Exit para processar todas as mensagens restantes na fila e, em seguida, para sair.If the user clicks Yes, the application calls Exit to process all remaining messages in the queue and then to quit.

O exemplo requer que listBox1 e button1 foram criados e colocados em um formulário.The example requires that listBox1 and button1 have been created and placed on a form.

public:
   static void main()
   {
      // Starts the application.
      Application::Run( gcnew Form1 );
   }

private:
   void button1_Click( Object^ sender, System::EventArgs^ e )
   {
      // Populates a list box with three numbers.
      int i = 3;
      for ( int j = 1; j <= i; j++ )
      {
         listBox1->Items->Add( j );
      }
      
      /* Determines whether the user wants to exit the application.
       * If not, adds another number to the list box. */
      while ( MessageBox::Show( "Exit application?", "",
         MessageBoxButtons::YesNo ) == ::DialogResult::No )
      {
         // Increments the counter ands add the number to the list box.
         i++;
         listBox1->Items->Add( i );
      }
      
      // The user wants to exit the application. Close everything down.
      Application::Exit();
   }
public static void Main(string[] args) {
    // Starts the application.
    Application.Run(new Form1());
 }
 
 private void button1_Click(object sender, System.EventArgs e) {
    // Populates a list box with three numbers.
    int i = 3;
    for(int j=1; j<=i; j++) {
       listBox1.Items.Add(j);
    }
 
    /* Determines whether the user wants to exit the application.
     * If not, adds another number to the list box. */
    while (MessageBox.Show("Exit application?", "", MessageBoxButtons.YesNo) == 
       DialogResult.No) {
       // Increments the counter ands add the number to the list box.
       i++;
       listBox1.Items.Add(i);
    }
 
    // The user wants to exit the application. Close everything down.
    Application.Exit();
 }

<STAThread()> _
Shared Sub Main() 	
   ' Starts the application.
   Application.Run(New Form1())
End Sub

Private Sub button1_Click(sender As object, e As System.EventArgs)
   ' Populates a list box with three numbers.
   Dim i As Integer = 3
   Dim j As Integer
   For j = 1 To i - 1
      listBox1.Items.Add(j)
   Next

   ' Checks to see whether the user wants to exit the application.
   ' If not, adds another number to the list box.
   While (MessageBox.Show("Exit application?", "", MessageBoxButtons.YesNo) = _ 
      DialogResult.No)
      ' Increments the counter and adds the number to the list box.
      i = i + 1
      listBox1.Items.Add(i)
   End While

   ' The user wants to exit the application. Close everything down.
   Application.Exit()
End Sub

Comentários

Normalmente, a função principal de um aplicativo chama esse método e passa para ele a janela principal do aplicativo.Typically, the main function of an application calls this method and passes to it the main window of the application.

Esse método adiciona um manipulador de eventos para o mainForm parâmetro para o Closed eventos.This method adds an event handler to the mainForm parameter for the Closed event. Chamadas do manipulador de eventos ExitThread para limpar o aplicativo.The event handler calls ExitThread to clean up the application.

Observação

O Dispose método da Form classe será chamada antes do retorno desse método.The Dispose method of the Form class will be called prior to the return of this method.

Veja também

Aplica-se a