1 using System;2 using System.Collections.Generic;3 using System.ComponentModel;4 using System.Data;5 using System.Drawing;6 using System.Text;7 using System.Windows.Forms;8 9 using System.Runtime.InteropServices;10 11 12 namespace ShutDownSys13 {14     public partial class Form1 : Form15     {16         public Form1()17         {18             InitializeComponent();19         }20 21         public class ShutDownSys22         { 23             //C#关机代码24             //这个结构体将会传递给API。使用StructLayout25             //(...特性，确保其中成员是按顺序排列的，C#编译器不会对其进行调整)26             [StructLayout(LayoutKind.Sequential, Pack = 1)]27             internal struct TokPriv1Luid28             {29                 public int Count; public long Luid; public int Attr;30             }31 32             //以下使用DLLImport特性导入了所需的Windows API。33             //导入这些方法必须是static extern的，并且没有方法体。34             //调用这些方法就相当于调用Windows API。35             [DllImport("kernel32.dll", ExactSpelling = true)]36             internal static extern IntPtr GetCurrentProcess();37 38             [DllImport("advapi32.dll", ExactSpelling = true, SetLastError = true)]39             internal static extern bool OpenProcessToken(IntPtr h,int acc,ref IntPtr phtok);40 41             [DllImport("advapi32.dll", SetLastError = true)]42             internal static extern bool LookupPrivilegeValueA43             (string host, string name, ref long pluid);44 45             [DllImport("advapi32.dll", ExactSpelling = true, SetLastError = true)]46             internal static extern bool47             AdjustTokenPrivileges(IntPtr htok,bool disall,ref TokPriv1Luid newst,int len,IntPtr prev,IntPtr relen);48 49             [DllImport("user32.dll", ExactSpelling = true, SetLastError = true)]50             internal static extern bool ExitWindowsEx(int flg,int rea);51 52             //C#关机代码53             //以下定义了在调用WinAPI时需要的常数。54             //这些常数通常可以从Platform SDK的包含文件(头文件)中找到。55             public const int SE_PRIVILEGE_ENABLED = 0x00000002;56             public const int TOKEN_QUERY = 0x00000008;57             public const int TOKEN_ADJUST_PRIVILEGES = 0x00000020;58             public const string SE_SHUTDOWN_NAME = "SeShutdownPrivilege";59             public const int EWX_LOGOFF = 0x00000000;60             public const int EWX_SHUTDOWN = 0x00000001;61             public const int EWX_REBOOT = 0x00000002;62             public const int EWX_FORCE = 0x00000004;63             public const int EWX_POWEROFF = 0x00000008;64             public const int EWX_FORCEIFHUNG = 0x00000010;65             // 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。66 67             68             public static void DoExitWin(int flg)69             {70                 bool ok;71                 TokPriv1Luid tp;72                 IntPtr hproc = GetCurrentProcess();73                 IntPtr htok = IntPtr.Zero;74                 ok = OpenProcessToken(hproc,TOKEN_ADJUST_PRIVILEGES|TOKEN_QUERY,ref htok);75                 tp.Count = 1;76                 tp.Luid = 0;77                 tp.Attr = SE_PRIVILEGE_ENABLED;78                 ok = LookupPrivilegeValueA(null,SE_SHUTDOWN_NAME,ref tp.Luid);79                 ok = AdjustTokenPrivileges(htok,false,ref tp,0,IntPtr.Zero,IntPtr.Zero);80                 ok = ExitWindowsEx(flg,0);81             }82         }83 84         //调用85         public void Reboot()86         {87             ShutDownSys.DoExitWin(ShutDownSys.EWX_FORCE | ShutDownSys.EWX_REBOOT);88         }89 90         public void ShutDown()91         {92             ShutDownSys.DoExitWin(ShutDownSys.EWX_FORCE | ShutDownSys.EWX_POWEROFF);93         }94 95         public void LogOff()96         {97             ShutDownSys.DoExitWin(ShutDownSys.EWX_FORCE | ShutDownSys.EWX_LOGOFF);98         }99
100         //关机
101         private void button1_Click(object sender, EventArgs e)
102         {
103             ShutDown();
104         }
105
106         //重启
107         private void button2_Click(object sender, EventArgs e)
108         {
109             Reboot();
110         }
111
112         //注销
113         private void button3_Click(object sender, EventArgs e)
114         {
115             LogOff();
116         }
117     }
118 }