调用API函数实现关机

您可以通过调用API函数ExitWindowEx来实现关机，示例如下：
 [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 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 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 );
 }
 
您只需在程序中调用DoExitWin( EWX_POWEROFF );即可实现关机操作。