unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;
const
MYMESSAGE=WM_USER+2000;
type
TForm1 = class(TForm)
Button1: TButton;
procedure Button1Click(Sender: TObject);
procedure FormCreate(Sender: TObject);
*******
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
var
hookHandle:HHOOK;
procedure TForm1.Button1Click(Sender: TObject);
begin
PostMessage(self.Handle,MYMESSAGE,0,0);
end;
function getMsgProc(code:integer;wParam:WPARAM;lParam:LPARAM)
:Longint;stdcall;
begin
if (Code = HC_ACTION) then
if PMsg(lParam)^.Message = MYMESSAGE then
begin
showMessage('已經截獲該消息');
end;
Result := CallNextHookEx(hookHandle, Code, WParam, Longint(@lParam));
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
hookHandle:=SetWindowsHookEx(WH_GETMESSAGE,
getMsgProc,HInstance,GetCurrentThreadId);
end;
end.