internal static extern bool AdjustTokenPrivileges(IntPtr htok, bool disall,

        ref TokPriv1Luid newst, int len, IntPtr prev, IntPtr relen);

        [DllImport("user32.dll", ExactSpelling = true, SetLastError = true)]

        internal static extern bool ExitWindowsEx(int flg, int rea);

        internal const int SE_PRIVILEGE_ENABLED = 0x00000002;

        internal const int TOKEN_QUERY = 0x00000008;

        internal const int TOKEN_ADJUST_PRIVILEGES = 0x00000020;

        internal const string SE_SHUTDOWN_NAME = "SeShutdownPrivilege";

        internal const int EWX_LOGOFF = 0x00000000;

        internal const int EWX_SHUTDOWN = 0x00000001;

        internal const int EWX_REBOOT = 0x00000002;

        internal const int EWX_FORCE = 0x00000004;

        internal const int EWX_POWEROFF = 0x00000008;

        internal const int EWX_FORCEIFHUNG = 0x00000010;

        private static void DoExitWin(int flg)

        {

            bool ok;

            TokPriv1Luid tp;

            IntPtr hproc = GetCurrentProcess();

            IntPtr htok = IntPtr.Zero;

            ok = OpenProcessToken(hproc, TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, ref htok);

            tp.Count = 1;

            tp.Luid = 0;

            tp.Attr = SE_PRIVILEGE_ENABLED;

            ok = LookupPrivilegeValue(null, SE_SHUTDOWN_NAME, ref tp.Luid);

            ok = AdjustTokenPrivileges(htok, false, ref tp, 0, IntPtr.Zero, IntPtr.Zero);

            ok = ExitWindowsEx(flg, 0);

        }

        //对客户机的控制应用API到此结束

        private UdpClient udpClient;

        private Thread waitThread;

        public UdpThread()

        {

            udpClient = new UdpClient(new IPEndPoint(IPAddress.Any, GlobalConsts.LOCAL_WAIT_PORT));

            ThreadStart ts = new ThreadStart(udpWait);

            waitThread = new Thread(ts);

            waitThread.Start();

        }

        public void close()

        {

            waitThread.Abort();

            udpClient.Close();

        }

        private void udpWait()

        {