gtk_file_selection_get_filename

[Andreas Tille <e2od5 mlucom urz uni-halle de>]

Hello,

I'm very new to gtk and want to play around something with
gtk_file_selection_get_filename().  Is someone able to give me
an advise to the following things?

1) I want the help_button Widget disappear in the window because
   I have no sensefull use for it.

2) I want to add a mask for filenames which are displayed in the
   file_list Widget (show all *.tiff or *.[ch], ...).

Is there anybody out there who has done such changes or can give
me a hint how to do that?

Thanks

    Andreas.