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C# Winform 實現(xiàn)屏蔽鍵盤的win和alt+F4的實現(xiàn)代碼

更新時間：2009年02月14日 14:34:24 作者：

最近在做一個惡搞程序，就是打開后，程序獲得桌面的截圖然后，然后全屏顯示在屏幕上，用戶此時則不能進(jìn)行任何操作。

此時希望用戶不能通過鍵盤alt+F4來結(jié)束程序及通過Win的組合鍵對窗口進(jìn)行操作。我在網(wǎng)上搜索了一下，采用全局鍵盤鉤子的方法可以做到屏蔽用戶對鍵盤的操作。。以下為相關(guān)代碼，用到了Form1_load事件和Form1_FormClosing事件：

復(fù)制代碼代碼如下:

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 
{ 
// 安裝鉤子 
[DllImport("user32.dll")] 
public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId); 
// 卸載鉤子 
[DllImport("user32.dll")] 
public static extern bool UnhookWindowsHookEx(int idHook); 
// 繼續(xù)下一個鉤子 
[DllImport("user32.dll")] 
public static extern int CallNextHookEx(int idHook, int nCode, Int32 wParam, IntPtr lParam); 
//聲明定義 
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(); 
} 
// 安裝鉤子 
public void HookStart() 
{ 
if (hKeyboardHook == 0) 
{ 
// 創(chuàng)建HookProc實例 
KeyboardHookProcedure = new HookProc(KeyboardHookProc); 
//定義全局鉤子 
hKeyboardHook = SetWindowsHookEx(13, KeyboardHookProcedure, Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().GetModules()[0]), 0); 
if (hKeyboardHook == 0) 
{ 
HookStop(); 
throw new Exception("SetWindowsHookEx failed."); 
} 
} 
} 
//鉤子子程就是鉤子所要做的事情。 
private int KeyboardHookProc(int nCode, Int32 wParam, IntPtr lParam) 
{ 
//這里可以添加別的功能的代碼 
return 1; 
} 
// 卸載鉤子 
public void HookStop() 
{ 
bool retKeyboard = true; 
if (hKeyboardHook != 0) 
{ 
retKeyboard = UnhookWindowsHookEx(hKeyboardHook); 
hKeyboardHook = 0; 
} 
if (!(retKeyboard)) throw new Exception("UnhookWindowsHookEx failed."); 
} 
} 
} 