public Area3DPtg(AreaReference arearef, int externIdx) {super(arearef);setExternSheetIndex(externIdx);}

public Area3DPtg ( AreaReference arearef , int externIdx ) { super ( arearef ) ; setExternSheetIndex ( externIdx ) ; }
public Area3DPtg(AreaReference arearef, int externIdx):base(arearef){ExternSheetIndex=(externIdx);}
