question about Gtk::Layout and Gtk::ScrolledWindow

[Antonio Coralles <noche suapie reflex at>]

when i add a Gtk::Layout to a Gtk::ScrolledWindow it just works like i 
want, as long as the parrent window is smaller than the size of my 
layout. but when it get's bigger, the layout is expanded in size, which 
is particullary not what i want .... so i would like to know if there is 
a way to prevent a layout inside a scrolled window from expanding after 
the the area inside the scrolled window matches  a particular size.
maybe someone can help me,
                                                   antonio