Application.RemoveMessageFilter(IMessageFilter) 方法

定義

命名空間:
System.Windows.Forms
組件:
System.Windows.Forms.dll

移除應用程式訊息泵浦中的訊息過濾器。

public:
 static void RemoveMessageFilter(System::Windows::Forms::IMessageFilter ^ value);
public static void RemoveMessageFilter(System.Windows.Forms.IMessageFilter value);
static member RemoveMessageFilter : System.Windows.Forms.IMessageFilter -> unit
Public Shared Sub RemoveMessageFilter (value As IMessageFilter)

參數

value
IMessageFilter

從應用程式中移除的 IMessageFilter 實作。

範例

在使用訊息過濾器之前，必須先提供介面的 IMessageFilter 實作。 以下類別會產生一個稱為 TestMessageFilter的訊息過濾器。 此過濾器會阻擋所有與左鍵相關的訊息。

// Creates a  message filter.
ref class TestMessageFilter: public IMessageFilter
{
public:
   [SecurityPermission(SecurityAction::LinkDemand, Flags = SecurityPermissionFlag::UnmanagedCode)]
   virtual bool PreFilterMessage( Message % m )
   {
      
      // Blocks all the messages relating to the left mouse button.
      if ( m.Msg >= 513 && m.Msg <= 515 )
      {
         Console::WriteLine( "Processing the messages : {0}", m.Msg );
         return true;
      }

      return false;
   }

};

// Creates a  message filter.
public class TestMessageFilter : IMessageFilter
{
    public bool PreFilterMessage(ref Message m)
    {
        // Blocks all the messages relating to the left mouse button.
        if (m.Msg >= 513 && m.Msg <= 515)
        {
            Console.WriteLine("Processing the messages : " + m.Msg);
            return true;
        }
        return false;
    }
}

' Creates a message filter.
<SecurityPermission(SecurityAction.LinkDemand, Flags := SecurityPermissionFlag.UnmanagedCode)> _
Public Class TestMessageFilter
    Implements IMessageFilter

    <SecurityPermission(SecurityAction.Demand)> _
    Public Function PreFilterMessage(ByRef m As System.Windows.Forms.Message) _
    As Boolean Implements IMessageFilter.PreFilterMessage
        ' Blocks all the messages relating to the left mouse button.
        If ((m.Msg >= 513) And (m.Msg <= 515)) Then
            Console.WriteLine("Processing the messages : " & m.Msg)
            Return True
        End If
        Return False
    End Function
End Class

備註

當你不想在 Windows 訊息發送前擷取時，可以移除訊息過濾器。

適用於

另請參閱