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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 HookTest
{
/// <summary>
/// Description of MainForm.
/// </summary>
public partial class MainForm : Form
{
//委托
public delegate int HookProc(int nCode, IntPtr wParam, IntPtr lParam);
static int hHook = 0;
public const int WH_KEYBOARD_LL = 2;
HookProc KeyBoardHookProcedure;
//键盘Hook结构函数
[StructLayout(LayoutKind.Sequential ) ]
public class KeyBoardHookStruct
{
public int vkCode;
public int scanCode;
public int flags;
public int time;
public int dwExtraInfo;
}
#region DllImport
//设置钩子
[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId);
[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
//抽掉钩子
public static extern bool UnhookWindowsHookEx(int idHook);
[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
//调用下一个钩子
public static extern int CallNextHookEx(int idHook, int nCode, IntPtr wParam, IntPtr lParam);
[DllImport("kernel32")]
public static extern int GetCurrentThreadId();
#endregion
#region 自定义事件
public void Hook_Start()
{
// 安装键盘钩子
if (hHook == 0)
{
KeyBoardHookProcedure = new HookProc(KeyBoardHookProc);
hHook = SetWindowsHookEx(WH_KEYBOARD_LL,
KeyBoardHookProcedure,
IntPtr.Zero, GetCurrentThreadId());
//如果设置钩子失败.
if (hHook == 0)
{
Hook_Clear();
throw new Exception("设置Hook失败!");
}
}
}
//取消钩子事件
public void Hook_Clear()
{
bool retKeyboard = true;
if (hHook != 0)
{
retKeyboard = UnhookWindowsHookEx(hHook);
hHook = 0;
}
//如果去掉钩子失败.
if (!retKeyboard) throw new Exception("UnhookWindowsHookEx failed.");
}
//这里可以添加自己想要的信息处理
public int KeyBoardHookProc(int nCode, IntPtr wParam, IntPtr lParam)
{
if ((nCode >= 0)&&((int)wParam ==13))
{
KeyBoardHookStruct kbh = (KeyBoardHookStruct)Marshal.PtrToStructure(lParam, typeof(KeyBoardHookStruct));
//MessageBox.Show(kbh.vkCode.ToString() + " " + kbh.flags.ToString());
//MessageBox.Show(nCode.ToString() + "-" + wParam.ToString() + "-" + lParam.ToString());
}
return CallNextHookEx(hHook, nCode, wParam, lParam);
}
#endregion
public MainForm()
{
//
// The InitializeComponent() call is required for Windows Forms designer support.
//
InitializeComponent();
//
// TODO: Add constructor code after the InitializeComponent() call.
//
}
void Start_BtnClick(object sender, EventArgs e)
{
this.Hook_Start();
}
void Clear_BtnClick(object sender, EventArgs e)
{
this.Hook_Clear();
}
}
}
//这里可以添加自己想要的信息处理
public int KeyBoardHookProc(int nCode, IntPtr wParam, IntPtr lParam)
{
if ((nCode >= 0)&&((int)wParam ==13))
{
KeyBoardHookStruct kbh = (KeyBoardHookStruct)Marshal.PtrToStructure(lParam, typeof(KeyBoardHookStruct));
//MessageBox.Show(kbh.vkCode.ToString() + " " + kbh.flags.ToString());
//MessageBox.Show(nCode.ToString() + "-" + wParam.ToString() + "-" + lParam.ToString());
}
return CallNextHookEx(hHook, nCode, wParam, lParam);
}