Message 구조체

정의

Windows 메시지를 구현합니다.Implements a Windows message.

public value class Message
public struct Message
type Message = struct
Public Structure Message
상속
Message

예제

다음 코드 예제에서는 재정의 하는 방법을 보여 줍니다 합니다 WndProc 에서 식별 하는 운영 체제 메시지를 처리 하는 메서드는 Message합니다.The following code example demonstrates overriding the WndProc method to handle operating system messages identified in the Message. WM_ACTIVATEAPP 운영 시스템 메시지는 다른 애플리케이션이 활성화 되는 시기를 알려면이 예제에서 처리 됩니다.The WM_ACTIVATEAPP operating system message is handled in this example to know when another application is becoming active. 사용 가능한 항목에 대 한 자세한 Message.Msg, Message.LParam, 및 Message.WParam 값을 참조 합니다 MSG 구조체 설명서.For information about the available Message.Msg, Message.LParam, and Message.WParam values, see the MSG Structure documentation. 실제 상수 값에 대 한 자세한 내용은 메시지 상수합니다.For information about the actual constant values, see Message Constants.

using namespace System;
using namespace System::Drawing;
using namespace System::Windows::Forms;
using namespace System::Security::Permissions;

namespace csTempWindowsApplication1
{
   public ref class Form1: public System::Windows::Forms::Form
   {
   private:

      // Constant value was found in the "windows.h" header file.
      static const Int32 WM_ACTIVATEAPP = 0x001C;
      Boolean appActive;

   public:
      Form1()
      {
         appActive = true;
         this->Size = System::Drawing::Size( 300, 300 );
         this->Text = "Form1";
         this->Font = gcnew System::Drawing::Font( "Microsoft Sans Serif",18.0F,System::Drawing::FontStyle::Bold,System::Drawing::GraphicsUnit::Point,((System::Byte)(0)) );
      }


   protected:
      virtual void OnPaint( PaintEventArgs^ e ) override
      {
         
         // Paint a string in different styles depending on whether the
         // application is active.
         if ( appActive )
         {
            e->Graphics->FillRectangle( SystemBrushes::ActiveCaption, 20, 20, 260, 50 );
            e->Graphics->DrawString( "Application is active", this->Font, SystemBrushes::ActiveCaptionText, 20, 20 );
         }
         else
         {
            e->Graphics->FillRectangle( SystemBrushes::InactiveCaption, 20, 20, 260, 50 );
            e->Graphics->DrawString( "Application is Inactive", this->Font, SystemBrushes::ActiveCaptionText, 20, 20 );
         }
      }


      [SecurityPermission(SecurityAction::Demand, Flags=SecurityPermissionFlag::UnmanagedCode)]
      virtual void WndProc( Message% m ) override
      {
         
         // Listen for operating system messages.
         switch ( m.Msg )
         {
            case WM_ACTIVATEAPP:
               
               // The WParam value identifies what is occurring.
               appActive = (int)m.WParam != 0;
               
               // Invalidate to get new text painted.
               this->Invalidate();
               break;
         }
         Form::WndProc( m );
      }

   };

}


[STAThread]
int main()
{
   Application::Run( gcnew csTempWindowsApplication1::Form1 );
}

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

namespace csTempWindowsApplication1
{
    public class Form1 : System.Windows.Forms.Form
    {
        // Constant value was found in the "windows.h" header file.
        private const int WM_ACTIVATEAPP = 0x001C;
        private bool appActive = true;

        [STAThread]
        static void Main() 
        {
            Application.Run(new Form1());
        }
        
        public Form1()
        {
            this.Size = new System.Drawing.Size(300,300);
            this.Text = "Form1";
            this.Font = new System.Drawing.Font("Microsoft Sans Serif", 18F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
        }

        protected override void OnPaint(PaintEventArgs e) 
        {
            // Paint a string in different styles depending on whether the
            // application is active.
            if (appActive) 
            {
                e.Graphics.FillRectangle(SystemBrushes.ActiveCaption,20,20,260,50);
                e.Graphics.DrawString("Application is active", this.Font, SystemBrushes.ActiveCaptionText, 20,20);
            }
            else 
            {
                e.Graphics.FillRectangle(SystemBrushes.InactiveCaption,20,20,260,50);
                e.Graphics.DrawString("Application is Inactive", this.Font, SystemBrushes.ActiveCaptionText, 20,20);
            }
        }

    [System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name="FullTrust")]
        protected override void WndProc(ref Message m) 
        {
            // Listen for operating system messages.
            switch (m.Msg)
            {
                // The WM_ACTIVATEAPP message occurs when the application
                // becomes the active application or becomes inactive.
                case WM_ACTIVATEAPP:

                    // The WParam value identifies what is occurring.
                    appActive = (((int)m.WParam != 0));

                    // Invalidate to get new text painted.
                    this.Invalidate();

                    break;                
            }
            base.WndProc(ref m);
        }
    }
}
Imports System.Drawing
Imports System.Windows.Forms

Namespace csTempWindowsApplication1

    Public Class Form1
        Inherits System.Windows.Forms.Form

        ' Constant value was found in the "windows.h" header file.
        Private Const WM_ACTIVATEAPP As Integer = &H1C
        Private appActive As Boolean = True

        <STAThread()> _
        Shared Sub Main()
            Application.Run(New Form1())
        End Sub

        Public Sub New()
            MyBase.New()

            Me.Size = New System.Drawing.Size(300, 300)
            Me.Text = "Form1"
            Me.Font = New System.Drawing.Font("Microsoft Sans Serif", 18.0!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        End Sub

        Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)

            ' Paint a string in different styles depending on whether the
            ' application is active.
            If (appActive) Then
                e.Graphics.FillRectangle(SystemBrushes.ActiveCaption, 20, 20, 260, 50)
                e.Graphics.DrawString("Application is active", Me.Font, SystemBrushes.ActiveCaptionText, 20, 20)
            Else
                e.Graphics.FillRectangle(SystemBrushes.InactiveCaption, 20, 20, 260, 50)
                e.Graphics.DrawString("Application is Inactive", Me.Font, SystemBrushes.ActiveCaptionText, 20, 20)
            End If
        End Sub
    <System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.Demand, Name:="FullTrust")> _
        Protected Overrides Sub WndProc(ByRef m As Message)
            ' Listen for operating system messages
            Select Case (m.Msg)
                ' The WM_ACTIVATEAPP message occurs when the application
                ' becomes the active application or becomes inactive.
            Case WM_ACTIVATEAPP

                    ' The WParam value identifies what is occurring.
                    appActive = (m.WParam.ToInt32() <> 0)

                    ' Invalidate to get new text painted.
                    Me.Invalidate()

            End Select
            MyBase.WndProc(m)
        End Sub
    End Class
End Namespace

설명

Message 구조는 Windows에서 보내는 메시지를 래핑합니다.The Message structure wraps messages that Windows sends. 메시지를 래핑하를 발송 하기 위해 창 프로시저에 할당할이 구조를 사용할 수 있습니다.You can use this structure to wrap a message and assign it to the window procedure to be dispatched. 또한 시스템 애플리케이션 또는 컨트롤에 보내는 메시지에 대 한 정보를 가져오려면이 구조를 사용할 수 있습니다.You can also use this structure to get information about a message the system sends to your application or controls. Windows 메시지에 대 한 자세한 내용은 참조 하십시오 메시지와 메시지 큐합니다.For more information about Windows messages, see Messages and Message Queues.

만들 수 없습니다는 Message 직접.You cannot create the Message directly. 대신는 Create 메서드.Instead, use the Create method. 효율성을 위해 합니다 Message 기존 풀을 사용 하 여 Messages 가능한 경우 새 대시보드를 인스턴스화하는 대신 합니다.For the sake of efficiency, the Message uses its pool of existing Messages instead of instantiating a new one, if possible. 그러나 경우는 Message 는 풀에서 사용할 수 없는, 새로 인스턴스화됩니다.However, if a Message is not available in the pool, a new one is instantiated.

속성

HWnd

메시지의 창 핸들을 가져오거나 설정합니다.Gets or sets the window handle of the message.

LParam

메시지의 LParam 필드를 지정합니다.Specifies the LParam field of the message.

Msg

메시지의 ID 번호를 가져오거나 설정합니다.Gets or sets the ID number for the message.

Result

메시지 처리에 대한 응답으로 Windows에 반환되는 값을 지정합니다.Specifies the value that is returned to Windows in response to handling the message.

WParam

메시지의 WParam 필드를 가져오거나 설정합니다.Gets or sets the WParam field of the message.

메서드

Create(IntPtr, Int32, IntPtr, IntPtr)

Message를 만듭니다.Creates a new Message.

Equals(Object)

지정한 개체와 현재 개체가 같은지 여부를 확인합니다.Determines whether the specified object is equal to the current object.

GetHashCode()

이 인스턴스의 해시 코드를 반환합니다.Returns the hash code for this instance.

GetLParam(Type)

LParam 값을 가져온 다음 개체로 변환합니다.Gets the LParam value and converts the value to an object.

ToString()

현재 String을 나타내는 Message을 반환합니다.Returns a String that represents the current Message.

연산자

Equality(Message, Message)

Message 인스턴스가 같은지 여부를 확인합니다.Determines whether two instances of Message are equal.

Inequality(Message, Message)

Message 인스턴스가 서로 다른지 여부를 확인합니다.Determines whether two instances of Message are not equal.

적용 대상

추가 정보