Заставить мерцать заголовок модального окна при щелчке на родительской форме

Оформил: DeeCo

{ 
  Under windows 2000/XP,if user open a modal dialog, 
  when the user click the modal form's parent form, 
  windows can flash the modal form title bar,how to do it by delphi? 
  you may create base form,let you modal form inherite from the base form, 
  and add under codes to the base form source: 
}

 type
   TFrmBase = class(TForm)
   protected
     procedure CreateParams(var Para: TCreateParams); override;
     {....}
   end;

   {.....}

 implementation

 procedure TFrmBase.CreateParams(var Para: TCreateParams);
 begin
   inherited;
   Para.WndParent := GetActiveWindow;
 end;