关于全局键盘钩子问题

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.Diagnostics;

namespace HookTest

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        public delegate int HookProc(int nCode, IntPtr wParam, IntPtr lParam);

        static int hHook = 0;

        public const int WH_KEYBOARD_LL = 13;

        HookProc KeyBoardHookProcedure;

        [StructLayout(LayoutKind.Sequential)]

        public class KeyBoardHookStruct

        {

            public int vkCode;

            public int scanCode;

            public int flags;

            public int time;

            public int dwExtraInfo;

        }



        //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);

        //取得模块句柄

        [DllImport("kernel32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]

        private static extern IntPtr GetModuleHandle(string lpModuleName);

        //寻找目标进程窗口

        [DllImport("USER32.DLL")]

        public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

        //设置进程窗口到最前

        [DllImport("USER32.DLL")]

        public static extern bool SetForegroundWindow(IntPtr hWnd);

        //模拟键盘事件

        [DllImport("User32.dll")]

        public static extern void keybd_event(Byte bVk, Byte bScan, Int32 dwFlags, Int32 dwExtraInfo);

        //释放按键的常量

        const int KEYEVENTF_KEYUP = 2;

       const int WM_KEYDOWN = 0x0100;

        

        public static int KeyBoardHookProc(int nCode, IntPtr wParam, IntPtr lParam)

        {

            

            //监控用户键盘输入

            KeyBoardHookStruct input = (KeyBoardHookStruct)Marshal.PtrToStructure(lParam, typeof(KeyBoardHookStruct));

            byte VK_Q = (byte)Keys.NumPad7;

            if (wParam == (IntPtr)WM_KEYDOWN && input.vkCode == (int)Keys.Q)

            {

               keybd_event(VK_Q, 0, 0, 0);//按下小键盘7

               keybd_event(VK_Q, 0, KEYEVENTF_KEYUP, 0); //松开小键盘7

               return 1;

            }

            if (input.vkCode == (int)Keys.Home)

            {

                IntPtr wcHandle = FindWindow(null, "Warcraft III");

                if (wcHandle != IntPtr.Zero)

                {

                    SetForegroundWindow(wcHandle);

                    byte VK_NUM1 = 219;

                    keybd_event(VK_NUM1, 0, 0, 0);

                    byte VK_NUM2 = 221;

                    keybd_event(VK_NUM2, 0, 0, 0);

                }

            }

           // if (input.vkCode == (int)Keys.End)

             //   new Form1().Hook_Clear();

            return CallNextHookEx(hHook, nCode, wParam, lParam);

        }

        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.");

        }







        public void Hook_Start() 

        {

            if (hHook == 0) 

            {

                KeyBoardHookProcedure = new HookProc(KeyBoardHookProc);

                hHook = SetWindowsHookEx(WH_KEYBOARD_LL, KeyBoardHookProcedure, GetModuleHandle(Process.GetCurrentProcess().MainModule.ModuleName), 0);

            }

            

        }



        private void button1_Click(object sender, EventArgs e)

        {

            MessageBox.Show("开启");

            Hook_Start();





        }



        private void button2_Click(object sender, EventArgs e)

        {

            MessageBox.Show("关闭");

            UnhookWindowsHookEx(hHook);

        }

    }

}

 if (input.vkCode == (int)Keys.Q) 

            {

                byte VK_Q = (byte)Keys.NumPad7;

                keybd_event(VK_Q, 0, 0, 0);//按下小键盘7

                keybd_event(VK_Q, 0, KEYEVENTF_KEYUP, 0); //松开小键盘7

                return 1;

            }