Widgets and selecting objects.

["Cristian S. Rocha" <crocha dc uba ar>]

Hello,

I'm programming a new widget. I need select objects in a area, as the
genome icon list. How must I draw the "selection shadow" in the widget?
Must I use a new "window" or draw a box over my objects? There are some
example or tutorial?

Thanks,
Cristian.

-- 
Cristian S. Rocha <crocha dc uba ar>
Universidad de Buenos Aires