using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Windows.Forms;namespace AssistToolSet.Util
{/// <summary>/// 键盘钩子类/// </summary>public class Hook{public delegate int HookProc(WH_CODE nCode, Int32 wParam, IntPtr lParam);public enum WH_CODE : int{WH_JOURNALRECORD = 0,WH_JOURNALPLAYBACK = 1,/// <summary>/// 进程钩子/// </summary>WH_KEYBOARD = 2,/// <summary>/// 底层键盘钩子 全局钩子就是用这个/// </summary>WH_KEYBOARD_LL = 13,}public enum HC_CODE : int{HC_ACTION = 0,HC_GETNEXT = 1,HC_SKIP = 2,HC_NOREMOVE = 3,HC_NOREM = 3,HC_SYSMODALON = 4,HC_SYSMODALOFF = 5}/// <summary>/// 安装钩子/// </summary>[DllImport("user32.dll", SetLastError = true, CallingConvention = CallingConvention.StdCall)]public static extern IntPtr SetWindowsHookEx(WH_CODE idHook, HookProc lpfn, IntPtr pInstance, uint threadId);/// <summary>/// 卸载钩子/// </summary>[DllImport("user32.dll", CallingConvention = CallingConvention.StdCall)]public static extern bool UnhookWindowsHookEx(IntPtr pHookHandle);/// <summary>/// 传递钩子/// </summary>[DllImport("user32.dll", CallingConvention = CallingConvention.StdCall)]public static extern int CallNextHookEx(IntPtr pHookHandle, WH_CODE nCodem, Int32 wParam, IntPtr lParam);/// <summary>/// 获取全部按键状态/// </summary>/// <param name="pbKeyState"></param>/// <returns>非0表示成功</returns>[DllImport("user32.dll")]public static extern int GetKeyboardState(byte[] pbKeyState);/// <summary>/// 获取程序集模块的句柄/// </summary>/// <param name="lpModuleName"></param>/// <returns></returns>[DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]public static extern IntPtr GetModuleHandle(string lpModuleName);/// <summary>/// 获取当前进程中的当前线程ID/// </summary>/// <returns></returns>[DllImport("kernel32.dll", CharSet = CharSet.Auto)]public static extern uint GetCurrentThreadId();#region 私有变量private byte[] mKeyState = new byte[256];private Keys mKeyData = Keys.None; //专门用于判断按键的状态/// <summary>/// 键盘钩子句柄/// </summary>private IntPtr mKetboardHook = IntPtr.Zero;/// <summary>/// 键盘钩子委托实例/// </summary>private HookProc mKeyboardHookProcedure;#endregion#region 键盘事件public event KeyEventHandler OnKeyDown;public event KeyEventHandler OnKeyUp;#endregion/// <summary>/// 构造函数/// </summary>public Hook(){GetKeyboardState(this.mKeyState);}~Hook(){UnInstallHook();}/// <summary>/// 键盘钩子处理函数/// </summary>private int KeyboardHookProc(WH_CODE nCode, Int32 wParam, IntPtr lParam){/*全局钩子应该这样设定KeyboardHookStruct MyKeyboardHookStruct = (KeyboardHookStruct)Marshal.PtrToStructure(lParam, typeof(KeyboardHookStruct));*/// 定义为线程钩子时，wParam的值是击打的按键，与Keys里的对应按键相同if ((nCode == (int)HC_CODE.HC_ACTION) && (this.OnKeyDown != null || this.OnKeyUp != null)){mKeyData = (Keys)wParam;KeyEventArgs keyEvent = new KeyEventArgs(mKeyData);//这里简单的通过lParam的值的正负情况与按键的状态相关联if (lParam.ToInt32() > 0 && this.OnKeyDown != null){this.OnKeyDown(this, keyEvent);}else if (lParam.ToInt32() < 0 && this.OnKeyUp != null){this.OnKeyUp(this, keyEvent);}}if (ShortcutManagement.s_bHotkeyUsed){ShortcutManagement.s_bHotkeyUsed = false;return 1;}return CallNextHookEx(this.mKetboardHook, nCode, wParam, lParam);}/// <summary>/// 安装钩子/// </summary>/// <returns></returns>public bool InstallHook(){//线程钩子时一定要通过这个取得的值才是操作系统下真实的线程uint result = GetCurrentThreadId();if (this.mKetboardHook == IntPtr.Zero){this.mKeyboardHookProcedure = new HookProc(this.KeyboardHookProc);//注册线程钩子时第三个参数是空this.mKetboardHook = SetWindowsHookEx(WH_CODE.WH_KEYBOARD, this.mKeyboardHookProcedure, IntPtr.Zero, result);/*如果是全局钩子应该这样使用this.mKetboardHook = SetWindowsHookEx(WH_CODE.WH_KEYBOARD_LL, mKeyboardHookProcedure,GetModuleHandle(System.Diagnostics.Process.GetCurrentProcess().MainModule.ModuleName), 0);*/if (this.mKetboardHook == IntPtr.Zero){return false;}}return true;}/// <summary>/// 卸载钩子/// </summary>/// <returns>true表示成功 </returns>public bool UnInstallHook(){bool result = true;if (this.mKetboardHook != IntPtr.Zero){result = UnhookWindowsHookEx(this.mKetboardHook) && result;this.mKetboardHook = IntPtr.Zero;}return result;}}}
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作者：PGEva
来源：CSDN
原文：https://blog.csdn.net/programvae/article/details/80292076
版权声明：本文为博主原创文章，转载请附上博文链接！