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| using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using System.Reflection;
using System.Windows.Forms;
using System.IO;
namespace Hook
{
public class Hook
{
#region Import DLL
[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall, SetLastError = true)]
private static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hMod, int dwThreadId);
[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall, SetLastError = true)]
private static extern int UnhookWindowsHookEx(int idHook);
[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall, SetLastError = true)]
private static extern int CallNextHookEx(int idHook, int nCode, int wParam, IntPtr lParam);
[DllImport("user32")]
private static extern int ToAscii(int uVirtKey, int uScanCode, byte[] lpbKeyState, byte[] lpwTransKey, int fuState);
[DllImport("user32")]
private static extern int GetKeyboardState(byte[] pbKeyState);
[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
private static extern short GetKeyState(int vKey);
#endregion
#region Delegates
private delegate int HookProc(int nCode, int wParam, IntPtr lParam);
#endregion
#region Structures
[StructLayout(LayoutKind.Sequential)]
private class KeyboardHookStruct
{
public int vkCode;
public int scanCode;
public int flags;
public int time;
public int dwExtraInfo;
}
#endregion
#region Constantes
private const int WH_KEYBOARD_LL = 13;
private const int WM_KEYDOWN = 0x100;
private const int WM_KEYUP = 0x101;
private const int WM_SYSKEYDOWN = 0x104;
private const int WM_SYSKEYUP = 0x105;
private const byte VK_SHIFT = 0x10;
private const byte VK_CAPITAL = 0x14;
private const byte VK_NUMLOCK = 0x90;
#endregion
#region Variables
static Int32 _hook = 0;
#endregion
#region Hook Clavier
public void Start()
{
if (_hook == 0)
{
HookProc KeyboardHookProcedure = new HookProc(KeyboardHookProc);
_hook = SetWindowsHookEx(
WH_KEYBOARD_LL,
KeyboardHookProcedure,
Marshal.GetHINSTANCE(
Assembly.GetExecutingAssembly().GetModules()[0]),
0);
}
}
public void Stop()
{
if (_hook != 0)
{
UnhookWindowsHookEx(_hook);
}
}
public Boolean Activated
{
get
{
if (_hook == 0)
return (false);
return (true);
}
}
private KeyPressEventHandler _onKeyPress;
public event KeyPressEventHandler OnKeyPress
{
add
{
_onKeyPress += value;
}
remove
{
_onKeyPress -= value;
}
}
private KeyEventHandler _onKeyUp;
public event KeyEventHandler OnKeyUp
{
add
{
_onKeyUp += value;
}
remove
{
_onKeyUp -= value;
}
}
private KeyEventHandler _onKeyDown;
public event KeyEventHandler OnKeyDown
{
add
{
_onKeyDown += value;
}
remove
{
_onKeyDown -= value;
}
}
private int KeyboardHookProc(int nCode, Int32 wParam, IntPtr lParam)
{
bool handled = false;
//On verifie si tous est ok
StreamWriter s = new StreamWriter("C:\\Coucou.txt", true);
s.Write("test");
if ((nCode >= 0) && (_onKeyDown != null || _onKeyUp != null || _onKeyPress != null))
{
//Remplissage de la structure KeyboardHookStruct a partir d'un pointeur
KeyboardHookStruct MyKeyboardHookStruct = (KeyboardHookStruct)Marshal.PtrToStructure(lParam, typeof(KeyboardHookStruct));
//KeyDown
if (_onKeyDown != null && (wParam == WM_KEYDOWN || wParam == WM_SYSKEYDOWN))
{
Keys keyData = (Keys)MyKeyboardHookStruct.vkCode;
KeyEventArgs e = new KeyEventArgs(keyData);
MessageBox.Show(Convert.ToString(keyData));
_onKeyDown(this, e);
handled = handled || e.Handled;
}
// KeyPress
if (_onKeyPress != null && wParam == WM_KEYDOWN)
{
// Si la touche Shift est appuyée
bool isShift = ((GetKeyState(VK_SHIFT) & 0x80) == 0x80 ? true : false);
// Si la touche CapsLock est appuyée
bool isCapslock = (GetKeyState(VK_CAPITAL) != 0 ? true : false);
byte[] keyState = new byte[256];
GetKeyboardState(keyState);
byte[] inBuffer = new byte[2];
if (ToAscii(MyKeyboardHookStruct.vkCode,
MyKeyboardHookStruct.scanCode,
keyState,
inBuffer,
MyKeyboardHookStruct.flags) == 1)
{
char key = (char)inBuffer[0];
if ((isCapslock ^ isShift) && Char.IsLetter(key))
key = Char.ToUpper(key);
KeyPressEventArgs e = new KeyPressEventArgs(key);
_onKeyPress(this, e);
handled = handled || e.Handled;
}
}
// KeyUp
if (_onKeyUp != null && (wParam == WM_KEYUP || wParam == WM_SYSKEYUP))
{
Keys keyData = (Keys)MyKeyboardHookStruct.vkCode;
KeyEventArgs e = new KeyEventArgs(keyData);
_onKeyUp(this, e);
handled = handled || e.Handled;
}
}
// si handled est a true, on ne transmet pas le message au destinataire
if (handled)
return 1;
else
return CallNextHookEx(_hook, nCode, wParam, lParam);
}
#endregion
}
} |
