procedure TForm1.Button1Click(Sender: TObject);
var pt : TPoint;
begin
Application.ProcessMessages;
Screen.Cursor := CrHourglass;
GetCursorPos(pt);
SetCursorPos(pt.x + 1, pt.y + 1);
Application.ProcessMessages;
SetCursorPos(pt.x - 1, pt.y - 1);
end;