C#实现的鼠标钩子

更新时间：2015年03月11日 14:33:47   投稿：hebedich    我要评论

本文给大家分享的是使用C#实现鼠标钩子功能，程序已能获取鼠标坐标，其他就没别的功能了，有需要的小伙伴参考下吧。

C#实现的鼠标钩子，可以获取鼠标在屏幕中的坐标，记得要以管理员权限运行才行

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Text;
using System.Windows.Forms;
namespace app01{
    public partial class Form1 : Form {
        public delegate int HookProc(int nCode, IntPtr wParam, IntPtr lParam);
        //定义钩子句柄
        public static int hHook = 0;
        //定义钩子类型
        public const int WH_MOUSE_LL = 14;
        public HookProc MyProcedure;
        //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);
        [StructLayout(LayoutKind.Sequential)]
        public class POINT{
            public int x;
            public int y;
        }
        [StructLayout(LayoutKind.Sequential)]
        public class MouseHookStruct {
            public POINT pt;
            public int hwnd;
            public int wHitTestCode;
            public int dwExtraInfo;
        }
        public Form1() {
            InitializeComponent();
        }
        private void button1_Click(object sender, EventArgs e) {
            if (hHook == 0) {
                MyProcedure = new HookProc(this.MouseHookProc);
                //这里挂节钩子
                hHook = SetWindowsHookEx(WH_MOUSE_LL, MyProcedure, Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().GetModules()[0]), 0);
                if (hHook == 0) {
                    MessageBox.Show("SetWindowsHookEx Failed");
                    return;
                }
                button1.Text = "卸载钩子";
            } else {
                bool ret = UnhookWindowsHookEx(hHook);
                if (ret == false){
                    MessageBox.Show("UnhookWindowsHookEx Failed");
                    return;
                }
                hHook = 0;
                button1.Text = "安装钩子";
            }
        }
        public int MouseHookProc(int nCode, IntPtr wParam, IntPtr lParam) {
            MouseHookStruct MyMouseHookStruct = (MouseHookStruct)Marshal.PtrToStructure(lParam, typeof(MouseHookStruct));
            if (nCode < 0) {
                return CallNextHookEx(hHook, nCode, wParam, lParam);
            } else {
                String strCaption = "x = " + MyMouseHookStruct.pt.x.ToString("d") + "  y = " + MyMouseHookStruct.pt.y.ToString("d");
                this.Text = strCaption;
                return CallNextHookEx(hHook, nCode, wParam, lParam);
            }
        }
    }
}