{2002.07.22 on how to send and receive system messages Author: Wang Zhen Yi nickname: LargeWang (Pharaoh) QQ: 33728007 Welcome Peng industry software www.pengesoft.com.cn
The following code Delphi7.0 passes, launch two processes after compiling, and then click Button1 in a window. }
Unit unit1;
Interface
Uses Windows, Messages, Sysutils, Variants, Classes, Graphics, Controls, Forms, Dialogs, Stdctrls;
type TForm1 = class (TForm) Button1: TButton; procedure FormCreate (Sender: TObject); procedure Button1Click (Sender: TObject); private Msg: LongInt; {Private declarations} protected procedure WndProc (var Message: TMessage); override; public
{Public declarations} END;
Var Form1: TFORM1;
IMPLEMentation
{$ R * .dfm}
Procedure TForm1.FormCreate (Sender: TOBJECT); Begin Msg: = RegisterWindowMessage ('WM_MYMESSAGE'); Self.Bringtofront; End;
Procedure TForm1.WndProc (Var Message: TMessage); begin if message.msg = msg dam caption: = '; showMessage (' received message "); end; end;
procedure TForm1.Button1Click (Sender: TObject); var M: TMessage; B: DWord; begin M.Msg: = Msg; B: = BSM_ALLCOMPONENTS; BroadcastSystemMessage (BSF_POSTMESSAGE, @B, M.Msg, M.WParam, M.LParam END;
End.
