用C#控制计算机重启、关机及注销

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;

namespace chkipsrv
{
    public class Shudown
      {
          [StructLayout(LayoutKind.Sequential, Pack = 1)]
        internal struct TokPriv1Luid
          {
            public int Count;
            public long Luid;
            public int Attr;
          }

          [DllImport("kernel32.dll", ExactSpelling = true)]
        internal static extern IntPtr GetCurrentProcess();

          [DllImport("advapi32.dll", ExactSpelling = true, SetLastError = true)]
        internal static extern bool OpenProcessToken(IntPtr h, int acc, ref IntPtr phtok);

          [DllImport("advapi32.dll", SetLastError = true)]
        internal static extern bool LookupPrivilegeValue(string host, string name, ref long pluid);

          [DllImport("advapi32.dll", ExactSpelling = true, SetLastError = true)]
        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 DoFlag, 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 DoFlag)
          {
            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(DoFlag, 0);
          }

        public static void Reboot()
          {
              DoExitWin(EWX_FORCE | EWX_REBOOT);
          }

        public static void PowerOff()
          {
              DoExitWin(EWX_FORCE | EWX_POWEROFF);
          }

        public static void LogOff()
          {
              DoExitWin(EWX_FORCE | EWX_LOGOFF);
          }
      }
}