bool CMSXCustom::GetFlagBh(IN const MxResbuf*  pParam,
                               OUT MxResbuf* pRetData)
    {
        CString sCoord = pParam->AtString(0);
        MxStrList sParam(sCoord);
        McGePoint3d pt;
        pt.x = sParam.GetDoubleAt(0);
        pt.y = sParam.GetDoubleAt(1);

        CString sAppName = _T("FlagBh");
        struct resbuf* pFilter =acutBuildList(RTDXF0,
            _T("INSERT"),   -3,1001,sAppName,RTNONE );

        AcDbObjectIdArray aryId;
        FindEntAtPoint(pt,pFilter,50,aryId);
        Mx::mcutRelRb(pFilter);

        if(aryId.isEmpty() )
            return false;

        CString sBh;
        bool isFindBh = false;

        for(long i = 0; i < aryId.length();i++)
        {
            AcDbObjectId id= aryId[i];
            McDbObjectPointer<AcDbBlockReference> spBlk(id,McDb::kForRead);
            if(spBlk.openStatus() == Mcad::eOk)
            {
                spBlk->close();
                if(GetFlagBhImp(sBh,id ) )
                {
                    isFindBh = true;
                    break;
                }
            }
        }
        if(isFindBh)
        {
            pRetData->AddString(sBh);

            return true;
        }
        else
        {
            return false;
        }
    }