C# 快速关机代码

今天用到这个，网上找个不错的，保存下来。

注意：这个方法是快速关机，不会保存你的任何未保存信息。

// 这个结构体将会传递给API。使用StructLayout  
        [StructLayout(LayoutKind.Sequential, Pack = 1)]  
        internal struct TokPriv1Luid  
        {  
            public int Count;  
            public long Luid;  
            public int Attr;  
        }  
 
        // 导入的方法必须是static extern的，并且没有方法体。调用这些方法就相当于调用Windows API。  
        [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 flg, int rea);  
 
 
        // 以下定义了在调用WinAPI时需要的常数。这些常数通常可以从Platform SDK的包含文件（头文件）中找到  
        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_SHUTDOWN = 0x00000001;  
        //internal const int EWX_LOGOFF = 0x00000000;  
        //internal const int EWX_REBOOT = 0x00000002;  
        //internal const int EWX_FORCE = 0x00000004;  
        //internal const int EWX_POWEROFF = 0x00000008;  
        //internal const int EWX_FORCEIFHUNG = 0x00000010;  
 
 
        // 通过调用WinAPI实现关机，主要代码再最后一行ExitWindowsEx，这调用了同名的WinAPI，正好是关机用的。  
        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);  
        }  
 
/// <summary>  
        /// 关机按钮  
        /// </summary>  
        /// <param name="sender"></param>  
        /// <param name="e"></param>  
        private void btnShutDown_Click(object sender, EventArgs e)  
        {  
            DialogResult dr = MessageBox.Show(@"确定要关机吗？请保存信息后按'是'，不关机按'否'", "提示信息", MessageBoxButtons.YesNo, MessageBoxIcon.Information);  
            if (dr == DialogResult.Yes)  
            {  
                CommonClass.DoExitWin(CommonClass.EWX_SHUTDOWN);   
            }   
        }