class CInputPointMonitor :
        public McEdInputPointMonitor
    {
    public:
        virtual ~CInputPointMonitor(void);

        static void AddPointMonitor(McEdInputPointManager* pInputManager);
        static void RemovePointMonitor(McEdInputPointManager* pInputManager);

    protected:
        CInputPointMonitor(void);

        virtual Mcad::ErrorStatus MonitorInputPointToolTip(IN const McDbObjectIdArray& pickedEntities,
            IN const McGePoint3d& pickedPoint,
            IN CString& sNewToolTipString
            );

    private:
        static CInputPointMonitor s_inputPointMonitor;
    };


    CInputPointMonitor CInputPointMonitor::s_inputPointMonitor;

    CInputPointMonitor::CInputPointMonitor(void)
    {
    }

    CInputPointMonitor::~CInputPointMonitor(void)
    {
    }
    void CInputPointMonitor::AddPointMonitor(McEdInputPointManager* pInputManager)
    {
        pInputManager->addPointMonitor(&s_inputPointMonitor);
    }

    void CInputPointMonitor::RemovePointMonitor(McEdInputPointManager* pInputManager)
    {
        pInputManager->removePointMonitor(&s_inputPointMonitor);
    }

    Mcad::ErrorStatus CInputPointMonitor::MonitorInputPointToolTip(IN const McDbObjectIdArray& pickedEntities,
                                                                   IN const McGePoint3d& pickedPoint,
                                                                   IN CString& sNewToolTipString
                                                                   )
    {
        if(!pickedEntities.isEmpty())
        {
            AcDbObjectId entId = pickedEntities[0];
            AcDbObjectPointer<AcDbEntity> spEnt(entId,AcDb::kForRead);
            if(spEnt.openStatus() == Acad::eOk)
            {
                CString sClassName = spEnt->isA()->name();

                AcDbHandle handle;
                spEnt->getAcDbHandle(handle);
                TCHAR szHandle[256];
                handle.getIntoAsciiBuffer(szHandle);

                CString sLayerName;
                {
                    AcDbObjectPointer<AcDbLayerTableRecord> spLayerTableRec(spEnt->layerId(),AcDb::kForRead);
                    if(spLayerTableRec.openStatus() == Acad::eOk)
                    {
                        LPCTSTR pszLayerName = NULL;
                        spLayerTableRec->getName(pszLayerName);
                        sLayerName = pszLayerName;
                    }
                }

                sNewToolTipString.Format(_T("类名:%s,层名:%s,名柄:%s"),sClassName,sLayerName,szHandle);
            }
        }
        return Mcad::eOk;
    }

    // 注册反应器

    CInputPointMonitor::AddPointMonitor(MxDraw::GetDatabase(m_hDrawOcx)->GetDocument()->inputPointManager());