success = SaveDTObjectA( o, win, req, file, mode, saveicon, attrs );
ULONG SaveDTObjectA( Object *, struct Window *, struct Requester *,
STRPTR, ULONG, BOOL, struct TagItem * );
success = SaveDTObject( o, win, req, file, mode, saveicon, tag1,
ULONG SaveDTObject( Object *, struct Window *, struct Requester *,
STRPTR, ULONG, BOOL, Tag, ... );