protected virtual void Dispose(bool disposing)
{
if (!disposed)
{
if (keyBoardHandle != IntPtr.Zero)
{
WindowsHookHelper.UnhookWindowsHookEx(
keyBoardHandle);
}
disposed = true;
}
}
public void RegisterHook()
{
using (Process process = Process.GetCurrentProcess())
using (ProcessModule module = process.MainModule)
{
IntPtr hModule = GetModuleHandle(module.ModuleName);
messageLoopControl.BeginInvoke(new Action(() =>
{
try
{
if (keyBoardHandle != IntPtr.Zero)
{
WindowsHookHelper.UnhookWindowsHookEx(keyBoardHandle);
}
}
catch { }
keyBoardHandle = WindowsHookHelper.SetWindowsHookEx(
WH_KEYBOARD_LL, keyBoardDelegate, hModule, 0);
}));
}
}
private IntPtr KeyboardHookDelegate(
Int32 Code, IntPtr wParam, IntPtr lParam)
{
if (Code < 0)
{
return(WindowsHookHelper.CallNextHookEx(
keyBoardHandle, Code, wParam, lParam));
}
var hookStruct = (KBDLLHOOKSTRUCT)Marshal.PtrToStructure(lParam, typeof(KBDLLHOOKSTRUCT));
if (wParam == (IntPtr)0x0100 || wParam == (IntPtr)0x0104) //KeyDown
{
Keys key = (Keys)hookStruct.vkCode;
if (key == Keys.LControlKey || key == Keys.RControlKey)
{
key = Keys.ControlKey;
if (modifiers.HasFlag(Keys.Control))
{
return(WindowsHookHelper.CallNextHookEx(
keyBoardHandle, Code, wParam, lParam));
}
}
else if (key == Keys.LMenu || key == Keys.RMenu)
{
key = Keys.Menu;
if (modifiers.HasFlag(Keys.Alt))
{
return(WindowsHookHelper.CallNextHookEx(
keyBoardHandle, Code, wParam, lParam));
}
}
else if (key == Keys.LShiftKey || key == Keys.RShiftKey)
{
key = Keys.ShiftKey;
if (modifiers.HasFlag(Keys.Shift))
{
return(WindowsHookHelper.CallNextHookEx(
keyBoardHandle, Code, wParam, lParam));
}
}
if (KeyBoardKeyPressed != null)
{
KeyBoardKeyPressed(this, new KeyEventArgs(key | modifiers));
}
if (key == Keys.ControlKey)
{
modifiers |= Keys.Control;
}
else if (key == Keys.Menu)
{
modifiers |= Keys.Alt;
}
else if (key == Keys.ShiftKey)
{
modifiers |= Keys.Shift;
}
else if (key == Keys.Delete && modifiers.HasFlag(Keys.Control) && modifiers.HasFlag(Keys.Alt))
{
modifiers &= ~Keys.Control;
modifiers &= ~Keys.Alt;
}
}
else if (wParam == (IntPtr)0x0101 || wParam == (IntPtr)0x0105) //KeyUp
{
Keys key = (Keys)hookStruct.vkCode;
if (key == Keys.LControlKey || key == Keys.RControlKey)
{
modifiers &= ~Keys.Control;
}
else if (key == Keys.LMenu || key == Keys.RMenu)
{
modifiers &= ~Keys.Alt;
}
else if (key == Keys.LShiftKey || key == Keys.RShiftKey)
{
modifiers &= ~Keys.Shift;
}
}
return(WindowsHookHelper.CallNextHookEx(
keyBoardHandle, Code, wParam, lParam));
}
