McDbObjectPointer<McDbViewportTableRecord> spViewport(Mx::ActiveArxDoc()->GetAcitveViewportId(),
                                                          McDb::kForWrite);
    if(spViewport.openStatus() != Mcad::eOk)
    {
        return false;
    }
    spViewport->setWidth(dDocW);
    spViewport->setHeight(dDocH);
    spViewport->setCenterPoint(cenPt.convertXYPlanar2d() );
    spViewport->setViewTwist(dRotate);