public IntPtr LowLevelKeyboardProc(int nCode, IntPtr wParam, IntPtr lParam)
{
bool fEatKeyStroke = false;
var wparamTyped = wParam.ToInt32();
if (Enum.IsDefined(typeof(KeyboardState), wparamTyped))
{
object o = Marshal.PtrToStructure(lParam, typeof(LowLevelKeyboardInputEvent));
LowLevelKeyboardInputEvent p = (LowLevelKeyboardInputEvent)o;
var eventArguments = new GlobalKeyboardHookEventArgs(p, (KeyboardState)wparamTyped);
EventHandler <GlobalKeyboardHookEventArgs> handler = KeyboardPressed;
handler?.Invoke(this, eventArguments);
fEatKeyStroke = eventArguments.Handled;
}
return(fEatKeyStroke ? (IntPtr)1 : CallNextHookEx(IntPtr.Zero, nCode, wParam, lParam));
}
private void Handle(GlobalKeyboardHookEventArgs e)
{
var key = (Keys)e.KeyboardData.VirtualCode;
var modifier = ToModifier(key);
var tuple = Tuple.Create(pressedModifiers, key);
if (e.KeyboardState == GlobalKeyboardHook.KeyboardState.KeyDown && key != lastKey)
{
lastKey = key;
pressedModifiers |= modifier;
if (registered.ContainsKey(tuple))
{
registered[tuple]();
}
}
else if (e.KeyboardState == GlobalKeyboardHook.KeyboardState.KeyUp)
{
lastKey = Keys.None;
pressedModifiers ^= modifier;
}
}
private void OnKeyPressed(object sender, GlobalKeyboardHookEventArgs e)
{
dispatch.Invoke((MethodInvoker) delegate { Handle(e); });
}