delphi程序全屏显示无标题栏覆盖整个屏幕(适合屏保)

procedure TMainFrm.FormCreate(Sender: TObject);
begin
with MainFrm do begin
{ Position form }
Top := 0 ;
Left := 0 ;
{ Go full screen}
BorderStyle := bsNone ;
WindowState := wsmaximized;
ClientWidth := Screen.Width ;
ClientHeight := Screen.Height;
Refresh;
SetForegroundWindow(Handle) ;
SetActiveWindow(Application.Handle) ;
end;
end;