BOOL IsModelSpace()
    {
        McDbObjectPointer<McDbLayout> spLayout(Mx::mcdbHostApplicationServices()->layoutManager()->currentLayoutId(),McDb::kForRead);
        if(spLayout.openStatus() != Mcad::eOk)
            return FALSE;

        if(spLayout->IsModelSpace() )
        {
            return TRUE ;
        }

        return FALSE;
    }