A custom class often overrides the following functions:
virtual Acad::ErrorStatus audit(AcDbAuditInfo* pAuditInfo); // Commonly useful, as this happens at a point where a new // object state is being committed. // virtual Acad::ErrorStatus subClose(); // The next two functions apply to container objects. // virtual Acad::ErrorStatus deepClone(AcDbObject* pOwnerObject, AcDbObject*& pClonedObject, AcDbIdMapping& idMap, Adesk::Boolean isPrimary = true) const; virtual Acad::ErrorStatus wblockClone(AcRxObject* pOwnerObject, AcDbObject*& pClonedObject, AcDbIdMapping& idMap, Adesk::Boolean isPrimary = true) const;