void SetClientData( int n, void* clientData );
void* GetClientData( int n );
void SetClientObject( int n, wxClientData* clientData );
wxClientData* GetClientObject( int n );
void SetClientData( int n, void* clientData );
void* GetClientData( int n );
void SetClientObject( int n, wxClientData* clientData );
wxClientData* GetClientObject( int n );