MxDrawXLib::IMxDrawUtilityPtr mxUtility;
            mxUtility.CreateInstance(__uuidof( MxDrawXLib::MxDrawUtility ));
            if(mxUtility == NULL)
            {
                return;
            }

            CComPtr<IMxDrawPoint> spPickPoint;
            IMxDrawEntityPtr spEntity = mxUtility->GetEntity(&spPickPoint,_T("请选择实体"));

            if(spEntity == NULL)
                return;

            IMxDrawResbufPtr spRet = spEntity->GetAllAppName();
            if(spRet == NULL)
                return;

            for(long i = 0; i < spRet->Count;i++)
            {
                AfxMessageBox(spRet->AtString(i) );
            }