判断软件的闲置时间（使用Application.OnMessage过滤所有键盘鼠标消息）

unit Unit1;
interface
uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, AppEvnts, ExtCtrls, StdCtrls;
type
  TForm1 = class(TForm)
    ApplicationEvents1: TApplicationEvents;
    tmr1: TTimer;
    edt1: TEdit;
    procedure ApplicationEvents1Message(var Msg: tagMSG;
      var Handled: Boolean);
    procedure tmr1Timer(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;
var
  Form1: TForm1;
  ElapsedTime:Longint;
implementation
{$R *.dfm}
procedure TForm1.ApplicationEvents1Message(var Msg: tagMSG;
  var Handled: Boolean);
begin
  case Msg.message of
    WM_KEYDOWN,WM_LBUTTONDOWN,WM_LBUTTONUP://各种键盘与鼠标消息
    begin
      ElapsedTime:=GetTickCount;
      //Handled:=True;这里不要把Handled设置为True,否则消息就不分发至WNDPROC了
    end;
  end;
end;
procedure TForm1.tmr1Timer(Sender: TObject);
begin
   if GetTickCount- ElapsedTime>60000 then
   begin
     tmr1.Enabled:=false;
     ShowMessage(‘1分钟软件没有操作了‘);
   end;
end;
end.