public override bool Dispatch(int code, IntPtr wParam, IntPtr lParam)
{
if (code != 0)
{
return(true);
}
var ev = (WM)wParam.ToUInt32();
try
{
var str = (KBDLLHOOKSTRUCT)Marshal.PtrToStructure(lParam, typeof(KBDLLHOOKSTRUCT));
var state = User32.GetAsyncKeyState(str.vkCode);
var keyInfo = new KeyEventInfo(ev, str, this, (state & 0x8000) != 0);
StoreSpecialKeyState(ev, keyInfo);
foreach (var Handler in Handlers)
{
if (!Handler(keyInfo))
{
return(false);
}
}
}
catch (Exception)
{
}
return(true);
}
private void StoreSpecialKeyState(WM Event, KeyEventInfo info)
{
var toggle = Event == WM.KEYDOWN || Event == WM.SYSKEYDOWN;
Modifiers Flag = Modifiers.None;
switch (info.VirtualKey)
{
case Keys.LMenu: Flag = Modifiers.LAlt; break;
case Keys.RMenu: Flag = Modifiers.RAlt; break;
case Keys.LControlKey: Flag = Modifiers.LCtrl; break;
case Keys.RControlKey: Flag = Modifiers.RCtrl; break;
case Keys.LShiftKey: Flag = Modifiers.LShift; break;
case Keys.RShiftKey: Flag = Modifiers.RShift; break;
default: return;
}
if (toggle)
{
ModifiersState |= Flag;
}
else
{
ModifiersState &= ~Flag;
}
}