gtkmm multiple fileselection

[Mertl Stefan <zongo gmx at>]

Is there a way to select multiple files in the gtkmm fileselection widget?
In Gtk the problem can be fixed that way:

gtk_clist_set_selection_mode (GTK_CLIST (GTK_FILE_SELECTION 
(filesel)->file_list),
                                 GTK_SELECTION_EXTENDED);


I tried to access the clist file_list, but as far as i could see, this clist 
is not available via the gtkmm wrapper.