unit Unit1; interface uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, ExtCtrls; type TForm1 = class(TForm) Timer1: TTimer; procedure Timer1Timer(Sender: TObject); procedure FormCreate(Sender: TObject); private { Private declarations } public { Public declarations } end; var Form1: TForm1; implementation {$R *.dfm} procedure TForm1.FormCreate(Sender: TObject); begin Application.ShowMainForm:=False; //隐藏窗体 Beep; end; procedure TForm1.Timer1Timer(Sender: TObject); begin Application.ShowMainForm:=True; //允许显示窗体 Application.MainForm.Show(); //显示窗体 Timer1.Enabled:=False; end; end.