Delphi 定时关机详细解释版

unit AutoShut1; 
interface 

uses 
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, 
  Dialogs, StdCtrls, ExtCtrls, Menus,AppEvnts,shellapi; 
type 
  TForm1 = class(TForm) 
  Timer1: TTimer; 
  Timer2: TTimer; 
  ApplicationEvents1: TApplicationEvents; 
  PopupMenu1: TPopupMenu; 
  Edit1: TEdit; 
  Edit2: TEdit; 
  Label1: TLabel; 
  Label2: TLabel; 
  Label3: TLabel; 
  Btn_OK: TButton; 
  Btn_Abort: TButton; 
  procedure Timer1Timer(Sender: TObject); 
  procedure TrayMenu(Var Msg:TMessage); message WM_USER; 
  procedure TimeSetClick(Sender: TObject); 
  procedure ExitClick(Sender: TObject); 
  procedure Btn_OKClick(Sender: TObject); 
  procedure Btn_AbortClick(Sender: TObject); 
  procedure Timer2Timer(Sender: TObject); 
  procedure Edit2KeyPress(Sender: TObject; var Key: Char); 
  procedure WMQueryEndSession (var Msg : TWMQueryEndSession); 
  message WM_QueryEndSession; 
  procedure FormCreate(Sender: TObject); 
  procedure FormDestroy(Sender: TObject); 
  procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean); 
private 
 { Private declarations } 
 Tray:NOTIFYICONDATA; 
 procedure ShowInTray(); 
public 
 { Public declarations } 
end; 

var 
  Form1: TForm1; 
  P,Ti1:Pchar; 
  Flags:Longint; 
  i:integer; 
  {关机延迟时间} 
  TimeDelay:integer; 
  atom:integer; 
  implementation 
 {$R *.dfm} 

{未到自动关机时间,系统要关闭时,截获关机消息 

wm_queryendsession,让用户决定是否关机} 
procedure TForm1.WMQueryEndSession (var Msg : TWMQueryEndSession); 
begin 
 if MessageDlg(’真的要关闭Windows吗?’,mtConfirmation,[mbYes,mbNo], 0) = mrNo then 
  Msg.Result := 0 
 else 
  Msg.Result := 1; 
 end; 

{判断时间S格式是否是有效} 

function IsValidTime(s:string):bool; 
begin 
 if  Length(s)<>5 then IsValidTime:=False 
 else 
 begin 
  if(s[1]<’0’)or(s[1]>’2’)or(s[2]<’0’)or 
       (s[2]>’9’) or (s[3] <> ’:’) or 
       (s[4]<’0’) or (s[4]>’5’) or 
       (s[5]<’0’) or (s[5]>’9’)then IsValidTime:=False 
  else 
   IsValidTime:=True; 
  end; 
end; 


{判断是哪类操作系统,以确定关机方式} 

function GetOperatingSystem: string; 
 var  osVerInfo: TOSVersionInfo; 
begin 
 Result :=’’; 
 osVerInfo.dwOSVersionInfoSize := SizeOf(TOSVersionInfo); 
 if GetVersionEx(osVerInfo) then 
  case osVerInfo.dwPlatformId of 
   VER_PLATFORM_WIN32_NT: 
   begin 
    Result := ’Windows NT/2000/XP’ 
  end; 
  VER_PLATFORM_WIN32_WINDOWS: 
  begin 
   Result := ’Windows 95/98/98SE/Me’; 
  end; 
 end; 
end; 


{获得计算机名} 

function GetComputerName: string; 
var 
 buffer: array[0..MAX_COMPUTERNAME_LENGTH + 1] of Char; 
 Size: Cardinal; 
begin 
  Size := MAX_COMPUTERNAME_LENGTH + 1; 
  Windows.GetComputerName(@buffer, Size); 
  Result := strpas(buffer); 
end; 

  
{定时关机函数 ,各参数的意义如下: 

Computer: 计算机名;Msg:显示的提示信息; 
Time:时间延迟; Force:是否强制关机; 
Reboot: 是否重启动} 
function TimedShutDown(Computer: string; Msg: string; 
 Time: Word; Force: Boolean; Reboot: Boolean): Boolean; 
var 
 rl: Cardinal; 
 hToken: Cardinal; 
 tkp: TOKEN_PRIVILEGES; 
begin 
  {获得用户关机特权,仅对Windows NT/2000/XP} 
  OpenProcessToken(GetCurrentProcess, TOKEN_ADJUST_PRIVILEGES or TOKEN_QUERY, hToken); 
  if LookupPrivilegeValue(nil, ’SeShutdownPrivilege’, tkp.Privileges[0].Luid) then 
  begin 
   tkp.Privileges[0].Attributes := SE_PRIVILEGE_ENABLED; 
   tkp.PrivilegeCount := 1; 
   AdjustTokenPrivileges(hToken, False, tkp, 0, nil, rl); 
  end; 
  Result := InitiateSystemShutdown(PChar(Computer), PChar(Msg), Time, Force, Reboot) 
end; 
撒嬌的浪費
{窗体最小化后,显示在托盘中} 

procedure tform1.ShowInTray; 
Begin 
 Tray.cbSize:=sizeof(Tray); 
 Tray.Wnd:=Self.Handle; 
 Tray.uFlags:=NIF_ICON+NIF_MESSAGE+NIF_TIP; 
 Tray.uCallbackMessage:=WM_USER; 
 Tray.hIcon:=application.Icon.Handle ; 
 Tray.szTip:=’定时关机’; 
 Shell_NotifyIcon(NIM_ADD,@Tray); 
End; 

{右键单击托盘中的图标,显示快捷菜单} 

procedure Tform1.TrayMenu(var Msg:TMessage); 
var 
 X,Y:Tpoint; 
 J,K:Integer; 
Begin 
 GetCursorPos(X); 
 GetCursorPos(Y); 
 J:=X.X; 
 K:=Y.Y; 
 if Msg.LParam=WM_RBUTTONDOWN then PopupMenu1.Popup(J,K); 
 End; 
  
procedure TForm1.Timer1Timer(Sender: TObject); 
begin 
 Edit1.Text:=FormatDateTime(’hh:mm’, Now); 
 {两个时间相等,计算机将在TimeDelay秒内强制关机} 
 if edit1.text=edit2.Text then 
 Begin 
  TimeDelay:=30; 
  timer1.Enabled:=False; 
 if GetOperatingSystem=’Windows NT/2000/XP’ then 
  begin 
   {调用系统的关机提示窗口,只限于Windows NT/2000/XP。} 
   TimedShutDown(getcomputername, ’系统将要关机!’, 
   TimeDelay, true, false); 
   btn_abort.Enabled :=true; 
   timer2.Enabled :=true; 
  end; 
 if  GetOperatingSystem=’Windows 95/98/98SE/Me’ then 
  begin 
    timer2.Enabled :=true; 
    {在顶层显示本程序的窗口,显示时间倒记时} 
    Application.Restore; 
    SetWindowPos(Handle,HWND_TOPMOST,Left,Top,Width,Height, 
               SWP_NOACTIVATE); 
  end; 
 end; 
end; 

procedure TForm1.Timer2Timer(Sender: TObject); 
begin 
  btn_abort.Enabled :=true; 
  label3.Caption :=’离关机时间还有’+inttostr(timedelay)+’秒。’; 
  if timedelay>0 then timedelay:=timedelay-1 
  else 
   begin 
    timer2.Enabled :=false; 
    {强制Windows 95/98/98SE/Me关机} 
    ExitWindowsEx(EWX_SHUTDOWN+EWX_FORCE,0); 
    end; 
  end; 

{通过控件PopupMenu1定义的快捷菜单,包括"设置关机时间"和"退出"。 

PopupMenu1的AutoPopup为False,下面是"设置关机时间"的代码} 
procedure TForm1.TimeSetClick(Sender: TObject); 
begin 
  {设置本程序窗口位于最顶层} 
  SetWindowPos(Handle,HWND_TOPMOST,Left,Top,Width,Height, 
               SWP_NOACTIVATE); 
  ShowWindow(Application.Handle,SW_NORMAL); 
  edit2.SetFocus ; 
  edit2.SelectAll ; 
end; 

{快捷菜单中"退出"的代码} 

procedure TForm1.ExitClick(Sender: TObject); 
begin 
  {如果已经开始倒记时,禁止退出,而是显示程序窗口} 
  if Timer2.Enabled=false then 
  begin 
    Application.Terminate; 
  end 
  else  ShowWindow(Application.Handle,SW_NORMAL); 
end; 

{确定按钮} 

procedure TForm1.Btn_OKClick(Sender: TObject); 
begin 
  btn_abort.Enabled :=false; 
  label3.Caption :=’提示:关机时间格式 HH:MM’; 
  if timer1.Enabled =false then timer1.Enabled :=true; 
  {关机时间设置有效,程序将显示在托盘中,无效则提示。} 
  if IsValidTime(edit2.Text) then 
    begin 
      ShowWindow(Application.Handle,sw_minimize); 
      ShowWindow(Application.Handle,sw_hide); 
      ShowInTray; 
    end 
  else 
    showmessage(’提示:时间格式错误,’+chr(13)+ 
    ’请输入正确的关机时间 HH:MM。’); 
end; 

{取消关机按钮} 

procedure TForm1.Btn_AbortClick(Sender: TObject); 
begin 
  if  GetOperatingSystem=’Windows NT/2000/XP’ then 
    {对于Windows NT/2000/XP,取消关机} 
    begin 
      AbortSystemShutdown(pchar(getcomputername)); 
    end; 
    {停止倒记时} 
  if timer2.Enabled =true then timer2.Enabled :=false; 
  btn_abort.Enabled :=false; 
end; 

{输入关机时间后,可直接按回车} 

procedure TForm1.Edit2KeyPress(Sender: TObject; var Key: Char); 
begin 
  if (key=#13)  then  Btn_OK.Click; 
end; 

{搜寻系统原子表看是否程序已运行} 

procedure TForm1.FormCreate(Sender: TObject); 
begin 
  {如果没运行则在表中增加信息 } 
  if GlobalFindAtom(’PROGRAM_RUNNING’) = 0 then 
    atom := GlobalAddAtom(’PROGRAM_RUNNING’) 
  else begin 
    {如果程序已运行则显示信息然后退出 } 
    MessageDlg(’程序已经在运行!’,mtWarning,[mbOK],0); 
    Halt; 
  end; 
end; 

procedure TForm1.FormDestroy(Sender: TObject); 
begin 
  {程序退出时,从原子表中移走信息} 
  GlobalDeleteAtom(atom); 
  {删除托盘中的图标} 
  Shell_NotifyIcon(NIM_DELETE,@Tray); 
end; 

procedure TForm1.FormCloseQuery(Sender: TObject; var CanClose: Boolean); 
begin 
  {如果已经开始倒记时,禁止关闭程序窗口} 
  if timer2.Enabled =true then canclose:=false; 
end; 
end. 

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