c# 全局钩子 (实例)

c# 全局钩子之键盘 (实例)
新建项目WinAPIMessage
新建一个form1窗体.增加2个button，增加事件。。然后复制如下面代码替换form1的代码(注意不要忘记增加button事件.
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;
using System.Diagnostics;

namespace WinAPIMessage
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        //委托 
        public delegate int HookProc(int nCode, int wParam, IntPtr lParam);
        static int hHook = 0;
        public const int WH_KEYBOARD_LL = 13;
        //LowLevel键盘截获，如果是WH_KEYBOARD＝2，并不能对系统键盘截取，Acrobat Reader会在你截取之前获得键盘。 
        HookProc KeyBoardHookProcedure;
        //键盘Hook结构函数 
        [StructLayout(LayoutKind.Sequential)]