此时希望用户不能通过键盘alt+F4来结束程序及通过Win的组合键对窗口进行操作。我在网上搜索了一下，采用全局键盘钩子的方法可以做到屏蔽用户对键盘的操作。。以下为相关代码，用到了Form1_load事件和Form1_FormClosing事件：


	复制代码 代码如下:

	

	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;

	using System.Reflection;

	namespace WindowsApplication10

	{

	public partial class Form1 : Form

	{

	// 安装钩子

	[DllImport("user32.dll")]

	public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId);

	// 卸载钩子

	[DllImport("user32.dll")]

	public static extern bool UnhookWindowsHookEx(int idHook);

	// 继续下一个钩子

	[DllImport("user32.dll")]

	public static extern int CallNextHookEx(int idHook, int nCode, Int32 wParam, IntPtr lParam);

	//声明定义

	public delegate int HookProc(int nCode, Int32 wParam, IntPtr lParam);

	static int hKeyboardHook = 0;

	HookProc KeyboardHookProcedure;

	public Form1()

	{

	InitializeComponent();

	}

	private void Form1_Load(object sender, EventArgs e)

	{

	HookStart();

	}

	private void Form1_FormClosing(object sender, FormClosingEventArgs e)

	{

	HookStop();

	}

	// 安装钩子

	public void HookStart()

	{

	if (hKeyboardHook == 0)

	{

	// 创建HookProc实例

	KeyboardHookProcedure = new HookProc(KeyboardHookProc);

	//定义全局钩子

	hKeyboardHook = SetWindowsHookEx(13, KeyboardHookProcedure, Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().GetModules()[0]), 0);

	if (hKeyboardHook == 0)

	{

	HookStop();

	throw new Exception("SetWindowsHookEx failed.");

	}

	}

	}

	//钩子子程就是钩子所要做的事情。

	private int KeyboardHookProc(int nCode, Int32 wParam, IntPtr lParam)

	{

	//这里可以添加别的功能的代码

	return 1;

	}

	// 卸载钩子

	public void HookStop()

	{

	bool retKeyboard = true;

	if (hKeyboardHook != 0)

	{

	retKeyboard = UnhookWindowsHookEx(hKeyboardHook);

	hKeyboardHook = 0;

	}

	if (!(retKeyboard)) throw new Exception("UnhookWindowsHookEx failed.");

	}

	}

	}


（注：该方法可以屏蔽win和alt+F4但是不能屏蔽ctrl+alt+del）