08# 키보드 후킹

2010년도에 만든 키보드 후킹 C# 버전

 
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
 
namespace KeyboardHook
{
    public partial class frmMain : Form
    {
        private CKeyHook cKey;
 
        public frmMain()
        {
            InitializeComponent();
        }
 
        private void frmMain_Load(object sender, EventArgs e)
        {
            frmMain Form = this;
            cKey = new CKeyHook(ref Form);
        }
 
        private void btnHookStart_Click(object sender, EventArgs e)
        {
            cKey.InstallHook();
        }
 
        private void btnHookStop_Click(object sender, EventArgs e)
        {
            cKey.UnistallHook();
        }
    }
}
 

 
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
using Microsoft.Win32;
using System.Reflection;
using System.Windows.Forms;
 
namespace KeyboardHook
{
    class CKeyHook
    {
#region "Keys"
        private const int WH_KEYBOARD_LL = 13;
        private const int GWL_HINSTANCE = -6;
        private const int HCBT_ACTIVATE = 5;
        private const int HCBT_CREATEWND = 3;
        private const int Enter = 13;
        private const int F1 = 112;
        private const int A = 65;
#endregion
        
#region  "DLL"
        private static IntPtr hookHandle;
 
        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern IntPtr SetWindowsHookEx(int idHook, MessageProc lpfn, IntPtr hMod, IntPtr dwThreadId);
 
        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        [return: MarshalAs(UnmanagedType.Bool)]
        private static extern bool UnhookWindowsHookEx(IntPtr hHook);
 
        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern IntPtr CallNextHookEx(IntPtr hhook, int nCode, IntPtr wParam, KBDLLHOOKSTRUCT lParam);
 
        [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern IntPtr GetModuleHandle(string lpModuleName);
 
        public delegate IntPtr MessageProc(int nCode, IntPtr wParam, ref KBDLLHOOKSTRUCT lParam);
 
        [MarshalAs(UnmanagedType.FunctionPtr)]
        MessageProc hookFunction;
 
        public struct KBDLLHOOKSTRUCT
        {
            public int vkCode;
            public int scanCode;
            public int flags;
            public int time;
            public int dwExtraInfo;
        }
 
       private frmMain TargetForm;
#endregion
 
#region  "Method"
       public CKeyHook(ref frmMain TargetForm)
        {
            this.TargetForm = TargetForm;
        }
 
        public void InstallHook()
        {
            hookFunction = new MessageProc(KeyboardCallback);
 
            //IntPtr hMod = System.Runtime.InteropServices.Marshal.GetHINSTANCE(this.GetType().Module );
 
            IntPtr hInstance = GetModuleHandle(null);
 
            //int hHandle =  Marshal.GetHINSTANCE(Assembly.GetCallingAssembly().GetModules()[0]).ToInt32();
 
            Console.WriteLine("hooked");
 
            //hookHandle = SetWindowsHookEx(WH_KEYBOARD_LL, hookFunction, IntPtr.Zero, new IntPtr(AppDomain.GetCurrentThreadId()));
            hookHandle = SetWindowsHookEx(WH_KEYBOARD_LL, hookFunction, hInstance, IntPtr.Zero);
            //hookHandle = SetWindowsHookEx(WH_KEYBOARD_LL, hookFunction, hMod, IntPtr.Zero);
        }
 
        public void UnistallHook()
        {
            bool hookCheck;
 
            hookCheck = UnhookWindowsHookEx(hookHandle);
 
            if (true == hookCheck)
            {
                Console.WriteLine("unhooked");
            }
            else
            {
                Console.WriteLine("unhooked fail");
            }
        }
 
        private IntPtr KeyboardCallback(int code, IntPtr wparam, ref KBDLLHOOKSTRUCT lparam)
        {
            try
            {
                //특수 키보드 에 해당 flags 값이 1이면 KEY_PRESS 이벤트  129이면 KEY_UP 이벤트
                //일반 키보드 에 해당 flags 값이 0이면 KEY_PRESS 이벤트  128이면 KEY_UP 이벤트
                if(lparam.flags == 0) //키 타입
                {
                    switch (lparam.vkCode) //키 정보 입력
                    {
                        case Enter :
                            TargetForm.lblKey.Text = "Enter";
                            break;
                        case A :
                            TargetForm.lblKey.Text = "A";
                            break;
                        default:
                            TargetForm.lblKey.Text = lparam.vkCode.ToString();
                            break;
                    }
                }
            }
            catch (System.Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
 
            IntPtr inPtr;
 
            try
            {
                inPtr = CallNextHookEx(hookHandle, code, wparam, lparam);
            }
            catch (System.Exception ex)
            {
 
                Console.WriteLine("NextHook: '" + ex);
                inPtr = new IntPtr(0);
            }
 
            return inPtr;
        }
#endregion
    }
}