Delphi关机程序NT版

以下是一段NT的关机程序（抄的）

procedure ExitWindowsNT(uFlags : integer);
var
  hToken : THANDLE;
  tkp, tkDumb : TTokenPrivileges;
  DumbInt : DWORD;
begin
  FillChar(tkp, sizeof(tkp), 0);
  // Get a token for this process
  if not (OpenProcessToken(GetCurrentProcess, TOKEN_ADJUST_PRIVILEGES
          or TOKEN_QUERY, hToken)) then
     raise Exception.create('OpenProcessToken failed with code '
               + inttostr(GetLastError));

  // Get the LUID for the Shutdown privilege
  LookupPrivilegeValue(nil, pchar('SeShutdownPrivilege'),
                       tkp.Privileges[0].Luid);

  tkp.PrivilegeCount := 1; // one privilege to set
  tkp.Privileges[0].Attributes := SE_PRIVILEGE_ENABLED;

  // Get the shutdown provolege for this process
  AdjustTokenPrivileges(hToken, false, tkp, sizeof(tkDumb), tkDumb, DumbInt);

  // Cannot test the return value of AdjustTokenPrivileges
  if GetLastError <> ERROR_SUCCESS then
     Raise Exception.create('AdjustTokenPrivileges failed with code '
               + inttostr(GetLastError));

  // shut down the system and for all applications to close
  if not ExitWindowsEx(uFlags, 0) then
     Raise Exception.create('ExitWindowsEx failed with code '
               + inttostr(GetLastError));
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  ExitWindowsNT(EWX_POWEROFF);
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
  ExitWindowsNT(EWX_REBOOT);
end;