C#实现关机的功能

namespace ShutDownTest { 
 using System;  
using System.Drawing;  
using System.Collections;  
using System.ComponentModel;  
using System.Windows.Forms;  
using System.Data;  
using System.Runtime.InteropServices;  
using System.Security.Principal; 
 [StructLayout(LayoutKind.Sequential, CharSet=CharSet.Auto)] 
public struct LUID 
{ 
  public uint LowPart; 
  public uint HighPart; 
}; 
 [StructLayout(LayoutKind.Sequential, CharSet=CharSet.Auto)] 
public struct TOKEN_PRIVILEGES 
{ 
  public uint PrivilegeCount; 
  public LUID Luid; 
  public uint Attributes; 
}; 
 public class PlatformImport  
{  
  [DllImport("advapi32", CharSet=CharSet.Auto)] 
  public static extern bool LookupPrivilegevalue (string sysname,string privname,ref LUID luid); 
   [DllImport("advapi32", CharSet=CharSet.Auto)] 
  public static extern bool AdjustTokenPrivileges(IntPtr handle, bool dsall,ref TOKEN_PRIVILEGES newstate,int len, IntPtr oldstate,IntPtr retlen); 
   [DllImport("kernel32.dll")]  
  public static extern int GetLastError();  
   
  [DllImport("user32.dll")]  
  public static extern bool ExitWindowsEx(int uFlags, int dwReason);  
}  
 public class Form1 : Form  
{  
  private Button button1;  
   public Form1()  
  {  
    this.button1 = new System.Windows.Forms.Button();  
   this.SuspendLayout();  
    this.button1.Location = new Point(136, 112);  
    = "button1";  
   this.button1.Size = new Size(80, 24);  
   this.button1.TabIndex = 0;  
   this.button1.Text = "Shut Down";  
   this.button1.Click += new EventHandler(this.button1_Click);  
    this.AutoScaleBaseSize = new Size(6, 14);  
   this.ClientSize = new Size(292, 273);  
   this.Controls.Add(button1);  
    = "Form1";  
   this.Text = "shutdown test";  
   this.ResumeLayout(false);  
  }  
   [STAThread]  
  static void Main()  
  {  
   Application.Run(new Form1());  
  }  
   private void button1_Click(object sender, System.EventArgs e)  
  {  
   WindowsIdentity identity = WindowsIdentity.GetCurrent(); 
   IntPtr token = identity.Token; 
   IntPtr luid = (IntPtr)0; 
   IntPtr previousState = (IntPtr)0; 
   IntPtr previousStateLength = (IntPtr)0; 
   LUID privilegeId = new LUID (); 
   PlatformImport.LookupPrivilegevalue ("", "SeShutdownPrivilege", ref privilegeId); 
    
    TOKEN_PRIVILEGES privileges = new TOKEN_PRIVILEGES();    privileges.PrivilegeCount = 1; 
   privileges.Luid = privilegeId; 
   privileges.Attributes = 2; 
   PlatformImport.AdjustTokenPrivileges (token, false, ref privileges, Marshal.SizeOf(privileges), previousState, previousStateLength); 
    if (PlatformImport.GetLastError() != 0) return;  
    if(!(PlatformImport.ExitWindowsEx(0x01 | 0x04, 0))) return; 
  } 
}  
}