wpf 钩子使用

最新推荐文章于 2024-05-04 15:56:47 发布

ajian11

最新推荐文章于 2024-05-04 15:56:47 发布

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本文链接：https://blog.youkuaiyun.com/ajian11/article/details/82504474

本文档展示了如何使用C#创建一个名为`CNxKeyBordHook`的类，该类用于捕获运行中的应用程序的键盘事件（按键、释放键和按键按压），以及一个名为`CNxMouseHook`的类，用于捕获鼠标事件（移动、点击、双击等）。这两个类通过设置低级钩子（WH_KEYBOARD_LL 和 WH_MOUSE_LL）来实现系统级的事件监听，并触发自定义的.NET事件。

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Text;
using System.Windows;
using System.Windows.Forms;

namespace Test
{
    ///   <summary>
    ///   这个类可以让你得到一个在运行中程序的所有键盘或鼠标事件
    ///   并且引发一个带KeyEventArgs参数的.NET事件以便你很容易使用这些信息
    ///   </summary>

    public class CNxKeyBordHook
    {
        private const int WM_KEYDOWN = 0x100;
        private const int WM_KEYUP = 0x101;
        private const int WM_SYSKEYDOWN = 0x104;
        private const int WM_SYSKEYUP = 0x105;

        //全局的事件
        public event KeyEventHandler OnKeyDownEvent;
        public event KeyEventHandler OnKeyUpEvent;
        public event KeyPressEventHandler OnKeyPressEvent;
        static int hKeyboardHook = 0;   //键盘钩子句柄
        //鼠标常量
        public const int WH_KEYBOARD_LL = 13;   //keyboard   hook   constant
        HookProc KeyboardHookProcedure;   //声明键盘钩子事件类型.
        //声明键盘钩子的封送结构类型
        [StructLayout(LayoutKind.Sequential)]
        public class KeyboardHookStruct
        {
            public int vkCode;   //表示一个在1到254间的虚似键盘码
            public int scanCode;   //表示硬件扫描码
            public int flags;
            public int time;
            public int dwExtraInfo;
        }
        //装置钩子的函数
        [DllImport("user32.dll ", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
        public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId);
        //卸下钩子的函数
        [DllImport("user32.dll ", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
        public static extern bool UnhookWindowsHookEx(int idHook);

        //下一个钩挂的函数
        [DllImport("user32.dll ", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
        public static extern int CallNextHookEx(int idHook, int nCode, Int32 wParam, IntPtr lParam);
        [DllImport("user32 ")]
        public static extern int ToAscii(int uVirtKey, int uScanCode, byte[] lpbKeyState, byte[] lpwTransKey, int fuState);
        [DllImport("user32 ")]
        public static extern int GetKeyboardState(byte[] pbKeyState);
        public delegate int HookProc(int nCode, Int32 wParam, IntPtr lParam);
        ///   <summary>
        ///   墨认的构造函数构造当前类的实例并自动的运行起来.
        ///   </summary>
        public CNxKeyBordHook()
        {
            Start();
        }
        //析构函数.
        ~CNxKeyBordHook()
        {
            Stop();
        }
        public void Start()
        {
            //安装键盘钩子
            if (hKeyboardHook == 0)
            {
                KeyboardHookProcedure = new HookProc(KeyboardHookProc);
                hKeyboardHook = SetWindowsHookEx(WH_KEYBOARD_LL, KeyboardHookProcedure, Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().ManifestModule), 0);
                if (hKeyboardHook == 0)
                {
                    Stop();
                    throw new Exception("Se