以下为原代码：

(这里给timer设置了1000ms)的参数，表示30秒的间隔！！

复制代码代码如下:

unit Unit1;

interface

uses

Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

Dialogs, StdCtrls, ExtCtrls;

type

TForm1 = class(TForm)

Memo1: TMemo;

Button1: TButton;

Timer1: TTimer;

procedure Timer1Timer(Sender: TObject);

procedure Button1Click(Sender: TObject);

private

{ Private declarations }

public

procedure AppMessageHandler(var Msg:TMsg;var Handled:Boolean);

{ Public declarations }

end;

var

Form1: TForm1;

implementation

{$R *.dfm}

{ TForm1 }

procedure TForm1.AppMessageHandler(var Msg: TMsg; var Handled: Boolean);

begin

if (msg.message=WM_MOUSEMOVE) or (msg.message=WM_KEYDOWN) then timer1.tag:=0;

end;

procedure TForm1.Timer1Timer(Sender: TObject);

begin

timer1.tag:=timer1.tag+1;

if Timer1.tag=30 then close;

end;

procedure TForm1.Button1Click(Sender: TObject);

begin

close;

end;

end.