- virtual int DoAppend(const wxString& item);
- virtual int DoInsert(const wxString& item, unsigned int pos);
- virtual void DoSetItemClientData(unsigned int n, void* clientData);
- virtual void* DoGetItemClientData(unsigned int n) const;
- virtual void DoSetItemClientObject(unsigned int n, wxClientData* clientData);
- virtual wxClientData* DoGetItemClientObject(unsigned int n) const;