IMxDrawUiPrPointPtr getPt;
    getPt.CreateInstance(__uuidof( MxDrawXLib::MxDrawUiPrPoint ));

    IMxDrawUiPrPoint* pGetPt = getPt;
    pGetPt->put_message(_T("点取绘制点"));

    pGetPt->go();

    IMxDrawResbufPtr spExData = pGetPt->getExData();

    long lRet = spExData->AtLong(0);

    // 得到返回结果.
    CString sT;
    sT.Format(_T("Ret::%d"),lRet);
    AfxMessageBox(sT);