Gtk::FileChooserDialog::run()

[Rob Benton <rob benton conwaycorp net>]

I'm confused about the showing and hiding of the dialog objects after 
their run function completes.

I'm opening a FileChooserDialog, calling run(), checking the response 
type for OK, and finally doing a little xml processing with Xerces which 
I check for exceptions.  If I catch an exception I throw up a 
Gtk::MessageDialog.

But after Gtk::FileChooserDialog::run() completes that dialog is still 
visibile and my Gtk::MessageDialog goes on top of that instead of my 
main window.  Is this expected behavior?