// 引入必要的命名空間

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

using System.Runtime.InteropServices; // 提供DllImport等特性，是P/Invoke的關(guān)鍵

namespace test

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

// 這個結(jié)構(gòu)體將會傳遞給API。使用StructLayout(...特性，確保其中的成員是按順序排列的，C#編譯器不會對其進行調(diào)整。

[StructLayout(LayoutKind.Sequential, Pack = 1)]

internal struct TokPriv1Luid

{

public int Count;

public long Luid;

public int Attr;

}

// 以下使用DllImport特性導入了所需的Windows API。

// 導入的方法必須是static extern的，并且沒有方法體。調(diào)用這些方法就相當于調(diào)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);

// 以下定義了在調(diào)用WinAPI時需要的常數(shù)。這些常數(shù)通常可以從Platform SDK的包含文件（頭文件）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_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;

// 通過調(diào)用WinAPI實現(xiàn)關(guān)機，主要代碼再最后一行ExitWindowsEx，這調(diào)用了同名的WinAPI，正好是關(guān)機用的。

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);

}

private void button1_Click(object sender, EventArgs e)

{

if (radioButton1.Checked == true)

{

DoExitWin(EWX_SHUTDOWN);

}

else

{

Application.Exit();

}

//MessageBox.Show("2");

}

}

}