file_selection widget

[Carlos Pereira <carlos pehoe civil ist utl pt>]

Dear all,
(terribly sorry for the duplication, I forgot the subject in my previous message...)

A couple of questions about the file_selection widget:

1) How can I change the color of the Cancel button to red?
   (in other words, how can I acess the pointer to the label?)

2) I would like to put my file_selection widget inside a notebook widget,
   with a different page for each file format, together with some specific options. 
   I tried to setup my file_selection as a GTK_WINDOW_POP_UP, instead
   of GTK_WINDOW_TOPLEVEL, first it seems to work but then when I try to put
    file_selection inside some other widget... no way...

3) How can I set the file_selection widget to show only the files with a given
   extension? say, the file_selection of the .ps page of the notebook should show 
   only .ps files and so on...

Many thanks for the help! (I need it...)

Carlos Pereira,
Technical University of Lisboa,
Portugal