title: catch/create OnGetFocus/OnLostFocus events for TCustomControl Delphi
body: <p>I created a Delphi component inherited from TCustomControl. The component can get focused as inherited from TWinControl, but I need to "highlight" when its get focused and change some properties when it loses the focus.
  As the Delphi documentation says, TCustomControl have no inherited OnFocus event, so I need to catch the event(?) and implement my own OnGetFocus/OnLostFocus event handlers(?).
  How can I catch the events when the component get/lose the focus?   </p>