public static bool IsExcludedKey(this Keys k) =>
k >= Keys.A && k <= Keys.Z
|| k >= Keys.NumPad0 && k <= Keys.Divide
|| k >= Keys.D0 && k <= Keys.D9
|| k >= Keys.Oem1 && k <= Keys.OemClear
|| k >= Keys.LShiftKey && k <= Keys.RShiftKey
|| k == Keys.CapsLock
|| k == Keys.Space;