question on menubar implementation

Hi, there. Didn't get many replies *g* to my last post ( http://list-archive.xemacs.org/xemacs-design/200412/msg00062.html ), so I'll post the question separately, maybe it won't be filtered out on subj=.*BeOS.* :p The menubar implementations I have seen so far all seem to construct menu trees on the fly (= submenus are created when an item is selected). It would be simpler for me if I could generate all the menu at once, and update it in case it changes. Is this at all possible ? François.