2 fragen zu HWND und HWND+Canvas

[k4ni]

wenn ich das jetzt richtig verstehe müsste das hier gehen ?!:

Delphi-Quellcode:

var
 DCanvas: TCanvas;
 DHandle: HWND;
 damn: HWND;
 currentcaption, currentminus2: Integer;
begin
 damn := FindWindow(NIL, 'MapleStory');
 DHandle:=GetDC(damn);
 if DHandle<>0 then
 begin
   try
     DCanvas:=TCanvas.Create;
     try
     DCanvas.Handle:=DHandle;
     if DCanvas.Pixels[293, 335] = RGB(239, 239, 239 )
       then
       begin
       Timer1.Enabled := false;
       Timer2.Enabled := false;

       Label4.Caption := inicurrent;
       Label4.Visible := true;
       Label5.Visible := true;


       Ini := TIniFile.Create(ExtractFilePath(ParamStr(0))+'LastPin_CorrectPin.txt');
       Ini.WriteString('rCracker', 'Correct Pin', inicurrent);

       if Checkbox1.Checked = true then
       PlaySound(PChar('logged.wav'),0,SND_ASYNC or SND_LOOP);
       
       ShowMessage ('Eingeloggt, Pin ist: '+inicurrent);
       PlaySound(nil,0,0);
        end
     finally
       DCanvas.Free;
     end;
    finally
      if ReleaseDc(0, DHandle)<>1 then
        RaiseLastOSError;
    end;
 end
 else
   RaiseLastOSError;
end;

Hab es mal versucht auf dem desktop und es ging immernoch.