鼠标钩子

先贴代码：

Codeusing System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;namespace MouseHook
{public partial class Form1 : Form{int hHook;//用来保存钩子句柄。HookProc hook;//用来存放消息处理函数。public Form1(){InitializeComponent();}/// 
/// 该函数用于安装钩子。/// /// /// private void button1_Click(object sender, EventArgs e){//所谓安装钩子就是调用SetWindowsHookEx方法。hook=new HookProc(MouseHookProc);hHook = SetWindowsHookEx(14,hook , IntPtr.Zero, 0); ;if (hHook > 0) { MessageBox.Show("钩子安装成功！"); } else { MessageBox.Show("钩子安装失败！"); }}/// 
/// 使用完必须卸载钩子。/// /// /// private void button2_Click(object sender, EventArgs e){//所谓卸载钩子就是调用UnhookWindowsHookEx方法if (hHook > 0){UnhookWindowsHookEx(hHook);}else{MessageBox.Show("还没有安装钩子！");}}/// 
/// 钩到消息后用这个函数来处理。/// /// /// /// /// private int MouseHookProc(int nCode, IntPtr wParam, IntPtr lParam){//钩到的鼠标消息就存放在地址为lParam的地方，Marshal.PtrToStructure方法就是用来把相应内存处的数据转换为.Net可以方便处理的数据结构(类)。var mhs = (MouseHookStruct)Marshal.PtrToStructure(lParam, typeof(MouseHookStruct));if (nCode < 0){return CallNextHookEx(hHook, nCode, wParam, lParam);//调用钩子链中的下一个钩子}else{//开始处理消息textBox1.Text = string.Format("当前鼠标位置为：({0},{1})", mhs.Point.X, mhs.Point.Y);//结束处理消息return CallNextHookEx(hHook, nCode, wParam, lParam);调用钩子链中的下一个钩子}}#region Win32API#region 系统接口public delegate int HookProc(int nCode, IntPtr wParam, IntPtr lParam);//钩子回调函数的委托（或签名）//安装钩子[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId);//卸载钩子[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]public static extern bool UnhookWindowsHookEx(int idHook);//调用下一个钩子[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]public static extern int CallNextHookEx(int idHook, int nCode, IntPtr wParam, IntPtr lParam);#endregion#region 数据结构[StructLayout(LayoutKind.Sequential)]public class POINT{public int X;public int Y;}[StructLayout(LayoutKind.Sequential)]public class MouseHookStruct{public POINT Point;public int hWnd;public int wHitTestCode;public int dwExtraInfo;}#endregion#endregion}
}

代码解释：

使用鼠标钩子只需要调用SetWindowsHookEx函数即可，该函数是操作系统给我们的API，通过引用外部函数的形式来引用。该函数需要参数有：1、钩子的类型(WH_MOUSE_LL=14为鼠标低级钩子)，2、钩子的回调函数(即钩到消息后怎么处理，该函数的类型用HookProc表示)，3、应用程序句柄(这里设为0)，4、线程句柄(也设为0)。安装之后钩子就应该可以运行了，贴下结果：

用完钩子之后记得卸载哦~~

转载于:https://www.cnblogs.com/killf/p/3492000.html

本文来自互联网用户投稿，文章观点仅代表作者本人，不代表本站立场，不承担相关法律责任。如若转载，请注明出处。 如若内容造成侵权/违法违规/事实不符，请点击【内容举报】进行投诉反馈！