【C语言教程】关机功能详解

所需工具:

C++

聪明的大脑

勤劳的双手

 

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教程如下

在网上找的一个在C#中实现关机的类,非常简单,就是一个winapi的封装。在这里记录一下,以备不时之需。

 	public static class Shutdown
 	{
 	     [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);
 	     }
 	}

 

 

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