求最简单的在C#里注销windowsXP。解决办法

求最简单的在C#里注销windowsXP。
我想在C#里注销windows 这个程序什么功能都没有，就只是注销系统。越简单越好，，求解。。。

[解决办法]

C# code

  private const int SE_PRIVILEGE_ENABLED = 0x00000002;        private const int TOKEN_QUERY = 0x00000008;        private const int TOKEN_ADJUST_PRIVILEGES = 0x00000020;        private const string SE_SHUTDOWN_NAME = "SeShutdownPrivilege";        [Flags]        public enum ExitWindows : uint        {            LogOff = 0x00, //注销            ShutDown = 0x01, //关机            Reboot = 0x02, //重启            Force = 0x04,            PowerOff = 0x08,            ForceIfHung = 0x10        }        [Flags]        private enum ShutdownReason : uint        {            MajorApplication = 0x00040000,            MajorHardware = 0x00010000,            MajorLegacyApi = 0x00070000,            MajorOperatingSystem = 0x00020000,            MajorOther = 0x00000000,            MajorPower = 0x00060000,            MajorSoftware = 0x00030000,            MajorSystem = 0x00050000,            MinorBlueScreen = 0x0000000F,            MinorCordUnplugged = 0x0000000b,            MinorDisk = 0x00000007,            MinorEnvironment = 0x0000000c,            MinorHardwareDriver = 0x0000000d,            MinorHotfix = 0x00000011,            MinorHung = 0x00000005,            MinorInstallation = 0x00000002,            MinorMaintenance = 0x00000001,            MinorMMC = 0x00000019,            MinorNetworkConnectivity = 0x00000014,            MinorNetworkCard = 0x00000009,            MinorOther = 0x00000000,            MinorOtherDriver = 0x0000000e,            MinorPowerSupply = 0x0000000a,            MinorProcessor = 0x00000008,            MinorReconfig = 0x00000004,            MinorSecurity = 0x00000013,            MinorSecurityFix = 0x00000012,            MinorSecurityFixUninstall = 0x00000018,            MinorServicePack = 0x00000010,            MinorServicePackUninstall = 0x00000016,            MinorTermSrv = 0x00000020,            MinorUnstable = 0x00000006,            MinorUpgrade = 0x00000003,            MinorWMI = 0x00000015,            FlagUserDefined = 0x40000000,            FlagPlanned = 0x80000000        }        [StructLayout(LayoutKind.Sequential, Pack = 1)]        private struct TokPriv1Luid        {            public int Count;            public long Luid;            public int Attr;        }        [DllImport("kernel32.dll", ExactSpelling = true)]        private static extern IntPtr GetCurrentProcess();        [DllImport("advapi32.dll", ExactSpelling = true, SetLastError = true)]        private static extern bool OpenProcessToken(IntPtr h, int acc, ref IntPtr phtok);        [DllImport("advapi32.dll", SetLastError = true)]        private static extern bool LookupPrivilegeValue(string host, string name, ref long pluid);        [DllImport("advapi32.dll", ExactSpelling = true, SetLastError = true)]        private static extern bool AdjustTokenPrivileges(IntPtr htok, bool disall, ref TokPriv1Luid newst, int len, IntPtr prev, IntPtr relen);        [DllImport("user32.dll")]        private static extern bool ExitWindowsEx(ExitWindows uFlags, ShutdownReason dwReason);        /// <summary>        /// 关机、重启、注销windows        /// </summary>        /// <param name="flag"></param>        public static void DoExitWindows(ExitWindows flag)        {            TokPriv1Luid tp;            IntPtr hproc = GetCurrentProcess();            IntPtr htok = IntPtr.Zero;            OpenProcessToken(hproc, TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, ref htok);            tp.Count = 1;            tp.Luid = 0;            tp.Attr = SE_PRIVILEGE_ENABLED;            LookupPrivilegeValue(null, SE_SHUTDOWN_NAME, ref tp.Luid);            AdjustTokenPrivileges(htok, false, ref tp, 0, IntPtr.Zero, IntPtr.Zero);            ExitWindowsEx(flag, ShutdownReason.MajorOther);        }
------解决方案-------------------- 
 
二楼的一点问题没有，很好用

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace WindowsControlTest
{
   public partial class Form1 : Form
   {
       public Form1()
       {
           InitializeComponent();
       }
       private const int SE_PRIVILEGE_ENABLED = 0x00000002;
       private const int TOKEN_QUERY = 0x00000008;
       private const int TOKEN_ADJUST_PRIVILEGES = 0x00000020;
       private const string SE_SHUTDOWN_NAME = "SeShutdownPrivilege";

       [Flags]
       public enum ExitWindows : uint
       {
           LogOff = 0x00, //注销
           ShutDown = 0x01, //关机
           Reboot = 0x02, //重启
           Force = 0x04,
           PowerOff = 0x08,
           ForceIfHung = 0x10
       }

       [Flags]
       private enum ShutdownReason : uint
       {
           MajorApplication = 0x00040000,
           MajorHardware = 0x00010000,
           MajorLegacyApi = 0x00070000,
           MajorOperatingSystem = 0x00020000,
           MajorOther = 0x00000000,
           MajorPower = 0x00060000,
           MajorSoftware = 0x00030000,
           MajorSystem = 0x00050000,
           MinorBlueScreen = 0x0000000F,
           MinorCordUnplugged = 0x0000000b,
           MinorDisk = 0x00000007,
           MinorEnvironment = 0x0000000c,
           MinorHardwareDriver = 0x0000000d,
           MinorHotfix = 0x00000011,
           MinorHung = 0x00000005,
           MinorInstallation = 0x00000002,
           MinorMaintenance = 0x00000001,
           MinorMMC = 0x00000019,
           MinorNetworkConnectivity = 0x00000014,
           MinorNetworkCard = 0x00000009,
           MinorOther = 0x00000000,
           MinorOtherDriver = 0x0000000e,
           MinorPowerSupply = 0x0000000a,
           MinorProcessor = 0x00000008,
           MinorReconfig = 0x00000004,
           MinorSecurity = 0x00000013,
           MinorSecurityFix = 0x00000012,
           MinorSecurityFixUninstall = 0x00000018,
           MinorServicePack = 0x00000010,
           MinorServicePackUninstall = 0x00000016,
           MinorTermSrv = 0x00000020,
           MinorUnstable = 0x00000006,
           MinorUpgrade = 0x00000003,
           MinorWMI = 0x00000015,
           FlagUserDefined = 0x40000000,
           FlagPlanned = 0x80000000
       }

       [StructLayout(LayoutKind.Sequential, Pack = 1)]
       private struct TokPriv1Luid
       {
           public int Count;
           public long Luid;
           public int Attr;
       }

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

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

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

       [DllImport("advapi32.dll", ExactSpelling = true, SetLastError = true)]
       private static extern bool AdjustTokenPrivileges(IntPtr htok, bool disall, ref TokPriv1Luid newst, int len, IntPtr prev, IntPtr relen);

       [DllImport("user32.dll")]
       private static extern bool ExitWindowsEx(ExitWindows uFlags, ShutdownReason dwReason);

       /// <summary>
       /// 关机、重启、注销windows
       /// </summary>
       /// <param name="flag"></param> 
 
       public static void DoExitWindows(ExitWindows flag)
       {
           TokPriv1Luid tp;
           IntPtr hproc = GetCurrentProcess();
           IntPtr htok = IntPtr.Zero;
           OpenProcessToken(hproc, TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, ref htok);
           tp.Count = 1;
           tp.Luid = 0;
           tp.Attr = SE_PRIVILEGE_ENABLED;
           LookupPrivilegeValue(null, SE_SHUTDOWN_NAME, ref tp.Luid);
           AdjustTokenPrivileges(htok, false, ref tp, 0, IntPtr.Zero, IntPtr.Zero);
           ExitWindowsEx(flag, ShutdownReason.MajorOther);
       }

       private void button1_Click(object sender, EventArgs e)
       {
           DoExitWindows(ExitWindows.LogOff);
       }

       private void button2_Click(object sender, EventArgs e)
       {
           DoExitWindows(ExitWindows.ShutDown);
       }
      
   }
}