[interfacekit] UI Widgets ?

Ok now after coding for some non-visual class, I'm a bit eager to jump in
the coding of a UI widget, like BTabControl or whatever. Before, I just want
to collect enough infos on what is the stanrd way to render the visual on
screen.  I don't want a low level explication, just the *path* I need to
take.

Like:

Do I use bitmaps (easily skineable), or simply drawing primitives (faster)
???
Is the drawing code built-in in the class, or I invoke some "centralized
render library" ???

etc.. etc ... etc ...

thanks !
Steve

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