Custom Buttons

["Diego A. Fons" <diegofons apexar com ar>]

Hi,

I have to render a custom button, i mean, a button with particular 
shape, so my question is what's the correct way to render a custom 
button? can i use the pixbuf engine for displaying pressed and no 
pressed images? Do i need to build an engine?

Regards,
Diego A. Fons.