[gtkmm] problem when updating a window

[bboldow <bboldow netcourrier com>]

Hi,

I've defined a window with a Gtk::Entry and a Gtk::VBox
When an entry is set, the fucntion signal_activate is called and should 
remove the VBox and build a a new VBox with some new objects (some 
Gtk::Text, some Gtk::VBow , and so on ...). But it doen't work. The 
modifications are not made. Is there an instruction to do this 
modifications ?

Thank you fot your answers.