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using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using System.Diagnostics;

namespace HookMouseAndKeyboard
{
    class HookMouseAndKeyboard
    {
        #region Ëø¶¨Êó±êºÍ¼üÅÌ
        //ÓйØÊó±êºÍ¼üÅ̹³×ÓµÄÏà¹Ø¶¨Òå
        static int hhookMouse = 0;
        static int hhookKeyBoard = 0;
        public const int WH_MOUSE = 14;
        public const int WH_KEYBOARD = 2;
        public const int WH_MOUSE_LL = 14;
        private const int WH_KEYBOARD_LL = 13;
        public const int HC_ACTION = 0;
        //public const int WM_KEYDOWN = 0x100;
        //public const int VK_RETURN = 0xD;
        public delegate int HookProc(int nCode, IntPtr wParam, IntPtr iParam);
        HookProc MouseHookProcedure, KeyBoardHookProcedure;
        [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)]
        public static extern int CallNextHookEx(int idHook, int nCode, IntPtr wParam, int lParam);
        [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
        public static extern bool UnhookWindowsHookEx(int idHook);
        /// <summary>
        /// ¹³×Ó´¦Àí·½·¨£¨Êó±êËø¶¨£©
        /// </summary>
        /// <param name="nCode"> </param>
        /// <param name="wParam"> </param>
        /// <param name="lParam"> </param>
        /// <returns> </returns>
        private int MouseHookProc(int nCode, IntPtr wParam, IntPtr lParam)
        {
            //Èç¹ûnCode <0£¬Ö±½Óµ÷ÓÃCallNextHookEx·µ»Ø
            if (nCode < 0)
                //return CallNextHookEx(hhookMouse,nCode,wParam,lParam);
                return 1;
            //º¯Êý½«ÏûÏ¢ÏòÏ´«µÝ£¬ÏÂÒ»¸ö¹³×Ó´¦Àí½«½Ø»ñÕâÒ»ÏûÏ¢
            //if(nCode!= HC_ACTION)
            //    return CallNextHookEx(hhookMouse, nCode, wParam, lParam);
            return 1;
        }
        /// <summary>
        /// Æô¶¯Êó±êËø¶¨
        /// </summary>
        /// <returns> </returns>
        public bool EnableMouseCapture()
        {
            MouseHookProcedure = new HookProc(this.MouseHookProc);
            Process currentProcess = Process.GetCurrentProcess();

            //°²×°È«¾ÖÊó±ê¹³×Ó
            hhookMouse = SetWindowsHookEx(WH_MOUSE_LL, MouseHookProcedure, currentProcess.MainModule.BaseAddress, 0);
            if (hhookMouse == 0)
                return false;
            return true;
        }
        /// <summary>
        /// ½â³ýÊó±êËø¶¨
        /// </summary>
        /// <returns> </returns>
        public bool DisableMouseCapture()
        {
            return UnhookWindowsHookEx(hhookMouse);
        }

        /// <summary>
        /// ¹³×Ó´¦Àí·½·¨£¨¼üÅÌËø¶¨£©
        /// </summary>
        /// <param name="nCode"> </param>
        /// <param name="wParam"> </param>
        /// <param name="lParam"> </param>
        /// <returns> </returns>
        private int KeyBoardHookProc(int nCode, IntPtr wParam, IntPtr lParam)
        {
            //Èç¹ûnCode <0£¬Ö±½Óµ÷ÓÃCallNextHookEx·µ»Ø
            if (nCode < 0)
                //return CallNextHookEx(hhookKeyBoard, nCode, wParam, lParam);
                return 1;
            //º¯Êý½«ÏûÏ¢ÏòÏ´«µÝ£¬ÏÂÒ»¸ö¹³×Ó´¦Àí½«½Ø»ñÕâÒ»ÏûÏ¢
            //if (nCode != HC_ACTION)
            //return CallNextHookEx(hhookKeyBoard, nCode, wParam, lParam);
            return 1;
        }
        /// <summary>
        /// Æô¶¯¼üÅÌËø¶¨
        /// </summary>
        /// <returns> </returns>
        public bool EnableKeyBoardCapture()
        {
            KeyBoardHookProcedure = new HookProc(this.KeyBoardHookProc);
            Process currentProcess = Process.GetCurrentProcess();

            //°²×°È«¾Ö¼üÅ̹³×Ó
            hhookKeyBoard = SetWindowsHookEx(WH_KEYBOARD_LL, KeyBoardHookProcedure, currentProcess.MainModule.BaseAddress, 0);
            if (hhookKeyBoard == 0)
                return false;
            return true;
        }
        /// <summary>
        /// ½â³ý¼üÅÌËø¶¨
        /// </summary>
        /// <returns> </returns>
        public bool DisableKeyBoardCapture()
        {
            return UnhookWindowsHookEx(hhookKeyBoard);
        }

        #endregion
    }
}