怎样修改windows里的开始按钮的位图？

/修改

var

Form1: TForm1;

StartButton: hWnd;

OldBitmap: THandle;

NewImage: TPicture;

/ 将代码放入FormCreate事件

procedure TForm1.FormCreate(Sender: TObject);

begin

NewImage := TPicture.create;

NewImage.LoadFromFile('C:\Windows\Circles.BMP');

StartButton := FindWindowEx

(FindWindow(

'Shell_TrayWnd', nil),

0,'Button', nil);

OldBitmap := SendMessage(StartButton,

BM_SetImage, 0,

NewImage.Bitmap.Handle);

end;

/还原

procedure TForm1.FormDestroy(Sender: TObject);

begin

SendMessage(StartButton,BM_SetImage,0,OldBitmap);

NewImage.Free;

end;

for win98se/delphi 5.0通过。