Hi,
For those interested in programming "GTK+ 2" graphical interfaces, several
examples codes are now available on the web:
http://www.altipoint.ch/index.php?id=147
The site is in French, but the source codes are much commented in English.
For GTK+ installation issues with xb, first have a look at xblite forum on
Google Groups where several threads were already posted.
Bye.
Julien