Application.RemoveMessageFilter(IMessageFilter) Metode

Definisi

Ruang nama:

System.Windows.Forms

Rakitan:

System.Windows.Forms.dll

Sumber:

Application.cs

Menghapus filter pesan dari pompa pesan aplikasi.

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)

Parameter

value

IMessageFilter

Implementasi IMessageFilter untuk menghapus dari aplikasi.

Contoh

Sebelum dapat menggunakan filter pesan, Anda harus menyediakan implementasi untuk IMessageFilter antarmuka. Kelas berikut membuat filter pesan yang disebut TestMessageFilter. Filter ini memblokir semua pesan yang berkaitan dengan tombol mouse kiri.

// 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

Keterangan

Anda dapat menghapus filter pesan saat Anda tidak ingin lagi mengambil pesan Windows sebelum dikirim.

Lihat juga

• AddMessageFilter(IMessageFilter)