Overriding OM GET()
From MorphOS Library
Grzegorz Kraszewski
IPTR MyClassGet(Class *cl, Object *obj, struct opGet *msg)
{
  switch (msg->opg_AttrID)
  {
    case Some_Integer_Tag:
      *msg->opg_Storage = /* value of the tag */;
    return TRUE;
    case Some_String_Tag:
      *(char**)msg->opg_Storage = "a fixed string value";
    return TRUE;
  }
  return DoSuperMethodA(cl, obj, (Msg)msg);
}
