SyntaxBomb - Indie Coders

Hi! I'm new to MaxGUI and just started to try basic tests (I'm using Vanilla on Windows 10)

I got 2 questions:
1. Is there a way to create own gadget with custom original functionality and rendering?

2. In VB .Net there is OnPaint event which I can override and draw whatever I want. Is there something similar in Bmx? How can I draw anything on TGadget?   

Thanks!