long FindItem( long start, long data );
long FindItem( long start, const wxPoint& pt, int direction ); // not supported in wxGLC
long HitTest( const wxPoint& point, int& flags);
long FindItem( long start, long data );
long FindItem( long start, const wxPoint& pt, int direction ); // not supported in wxGLC
long HitTest( const wxPoint& point, int& flags);