Thx Alberto, Like I mentioned, PACK_EXPAND_WIDGET does not help. Maybe it is because my VBox is within a paned window?
When I resize the window, the Widget inside does not grow with it. I´ve tried all pack options (Widget is a VBox) but it has no effect.You don't see a Vbox. Vbox could be expanded, the problem are the widget in the vbox that should expand.Try adding widget in vbox with some code like this:vb->pack_start <cid:part1.05000100.08090009@paro.homeunix.org>(*wid, PACK_EXPAND_WIDGET);vb = your VBOX wid= your widget. Also give a look to tutorial in containers section.