window hierarchy until the event is processed or there are no more event handlers.
The application should call wxEvent::GetId to check the identity of the clicked-on window,
and then either show some suitable help or call wxEvent::Skip if the identifier is unrecognised.
-Calling Skip is important because it allows wxWindows to generate further events for ancestors
+Calling Skip is important because it allows wxWidgets to generate further events for ancestors
of the clicked-on window. Otherwise it would be impossible to show help for container windows,
since processing would stop after the first window found.