RibbonControl
serves as a base class for all controls which share the ribbon
charactertics of having a ribbon art provider, and (optionally) non-continous
resizing.
Despite what the name may imply, it is not the top-level control for creating a
ribbon interface - that is RibbonBar
. Ribbon controls often have a region which
is “transparent”, and shows the contents of the ribbon page or panel behind it.
If implementing a new ribbon control, then it may be useful to realise that this
effect is done by the art provider when painting the background of the control,
and hence in the paint handler for the new control, you should call a draw background
method on the art provider ( RibbonMSWArtProvider.DrawButtonBarBackground()
and
RibbonMSWArtProvider.DrawToolBarBackground()
typically just redraw what is behind the
rectangle being painted) if you want transparent regions.