internal static void ToKeyMsg(this NSEvent e, out Msg msg, out IntPtr wParam, out IntPtr lParam)
{
var key = KeysConverter.GetKeys(e);
var isExtendedKey = XplatUICocoa.IsCtrlDown || XplatUICocoa.IsCmdDown || e.Characters.Length == 0 || !KeysConverter.IsChar(e.Characters[0], key) && KeysConverter.DeadKeyState == 0;
ulong lp = 0;
lp |= e.IsARepeat ? 1ul : 0ul;
lp |= ((ulong)e.KeyCode) << 16; // OEM-dependent scanCode
lp |= (isExtendedKey ? 1ul : 0ul) << 24;
lp |= (e.IsARepeat ? 1ul : 0ul) << 30;
lParam = (IntPtr)lp;
wParam = (IntPtr)key;
var isSysKey = false; // altDown && !cmdDown
msg = isSysKey ? (e.Type == NSEventType.KeyDown ? Msg.WM_SYSKEYDOWN : Msg.WM_SYSKEYUP) : (e.Type == NSEventType.KeyDown ? Msg.WM_KEYDOWN : Msg.WM_KEYUP);
}