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Graphics Interchange Format  |  1998-02-10  |  44.8 KB  |  437x355  |  4-bit (16 colors)
   ocr: (w_ancestor) (W_ancestor- deita) w-antestor. frame) W ancestor response) W ancestor sheety (w.ancestor_frame deital (w_ancestor response delta) w.ancestor.sheet delta) (w.ancestor.find) Wancestor. sheets tabs) (w_ancestor find delta) w.ancestor_s Sheettab_deita) w_frame W_find client Wchent Figure 3. This figure shows the same object model as in Figure 2 with delta classes added to allow changes to class library behavior without modifying the class library. This architecture is useful if you purchased your class libraries and would like to upgrade to a later version while also making changes t ...