想要一个键盘钩子的实例

Question

刚自学了点c#，对于键盘事件掌握不深，对于hook感兴趣，不知哪位高人给个hook实例，谢谢。

Answer 1

http://topic.csdn.net/u/20090106/12/8c4c1a5d-4e99-4f3f-b0cd-e1c0129e2a29.html

Answer 2

 [DllImport("user32.dll", CharSet = CharSet.Auto)]
        public static extern IntPtr SetWindowsHookEx(int hookid, HookProc pfnhook, IntPtr hinst, int threadid);        [DllImport("user32.dll", CharSet = CharSet.Auto, ExactSpelling = true)]
        public static extern bool UnhookWindowsHookEx(IntPtr hhook);     public delegate IntPtr HookProc(int nCode, IntPtr wParam, IntPtr lParam); public enum WindowsHookCodes
    {
        WH_MSGFILTER = (-1),
        WH_JOURNALRECORD = 0,
        WH_JOURNALPLAYBACK = 1,
        WH_KEYBOARD = 2,
        WH_GETMESSAGE = 3,
        WH_CALLWNDPROC = 4,
        WH_CBT = 5,
        WH_SYSMSGFILTER = 6,
        WH_MOUSE = 7,
        WH_HARDWARE = 8,
        WH_DEBUG = 9,
        WH_SHELL = 10,
        WH_FOREGROUNDIDLE = 11,
        WH_CALLWNDPROCRET = 12,
        WH_KEYBOARD_LL = 13,
        WH_MOUSE_LL = 14
    }
 [DllImport("kernel32.dll", ExactSpelling = true, CharSet = CharSet.Auto)]
        public static extern int GetCurrentThreadId();    public class HookMessage
    {
        private IntPtr m_HookEx;
        /// <summary>
        /// 设置自己进程的钩子
        /// </summary>
        /// <param name="p_HookCodes">钩子类型</param>
        public HookMessage(WindowsHookCodes p_HookCodes)
        {
            m_HookEx = SetWindowsHookEx((int)p_HookCodes, new HookProc(SetHookProc), IntPtr.Zero, GetCurrentThreadId());
        }
        /// <summary>
        /// 设置进程的钩子
        /// </summary>
        /// <param name="p_HookCodes">钩子类型</param>
        /// <param name="p_ThreadID">全局钩子</param>
        public HookMessage(WindowsHookCodes p_HookCodes, bool p_Zero)
        {         
            IntPtr _Value =System.Runtime.InteropServices.Marshal.GetHINSTANCE(System.Reflection.Assembly.GetExecutingAssembly().GetModules()[0]);
            m_HookEx = SetWindowsHookEx((int)p_HookCodes, new HookProc(SetHookProc), _Value, 0);
        }
        /// <summary>
        /// 关闭钩子
        /// </summary>
        public void UnHookMessage()
        {
            if (UnhookWindowsHookEx(m_HookEx))
            {
                m_HookEx = IntPtr.Zero;
            }
        }        public delegate void GetHookMessage(int p_Code, IntPtr p_wParam, IntPtr p_lParam,ref bool p_Send);
        public event GetHookMessage GetHook;        private IntPtr SetHookProc(int p_Code, IntPtr p_wParam, IntPtr p_lParam)
        {
            GC.Collect();
            GC.WaitForPendingFinalizers();
            GC.Collect();
            bool _SendMessage = true;
            if (GetHook != null) GetHook(p_Code, p_wParam, p_lParam, ref _SendMessage);
            if (!_SendMessage) return new IntPtr(1);
            return IntPtr.Zero;
        }
    }把这些放到一个单独的项目里 编译成DLL 调用就可以了..不复杂的.