整理出来的一个windows关机、锁定、重启、注销 API调用

using System.Runtime.InteropServices;  
  
namespace HookDemo  
{  
    class WindowsExit  
    {  
        [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", ExactSpelling = true, SetLastError = true)]  
        private static extern bool ExitWindowsEx(int DoFlag, int rea);  
        [DllImport("user32.dll")]  
        public static extern void LockWorkStation();  
  
        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";  
        private const int EWX_LOGOFF = 0x00000000;  
        private const int EWX_SHUTDOWN = 0x00000001;  
        private const int EWX_REBOOT = 0x00000002;  
        private const int EWX_FORCE = 0x00000004;  
        private const int EWX_POWEROFF = 0x00000008;  
        private const int EWX_FORCEIFHUNG = 0x00000010;  
  
        private static bool 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);  
            return ok;  
        }  
  
        /// <summary>  
        /// 锁定计算机  
        /// </summary>
        public static void Lock()  
        {  
            LockWorkStation();  
        }  
  
        /**/  
        /// <summary>  
        /// 重新启动  
        /// </summary>
        public static bool Reboot()  
        {  
            return DoExitWin(EWX_FORCE | EWX_REBOOT);  
        }  
  
        /**/  
        /// <summary>  
        /// 关机  
        /// </summary>
        public static bool PowerOff()  
        {  
            return DoExitWin(EWX_FORCE | EWX_POWEROFF);  
        }  
  
        /**/  
        /// <summary>  
        /// 注销  
        /// </summary>
        public static bool LogOff()  
        {  
            return DoExitWin(EWX_FORCE | EWX_LOGOFF);  
        }  
    }  
}  

参考：http://www.wxzzz.com/?id=58