// TODO enne - do we need to differentiate the number of columns
    // in the message window and the number of columns on the CRT?
    return m_region_crt->mx;

    switch (m_active_layer)
    {
    default:
        return 0;
    case LAYER_NORMAL:
        return m_region_msg->mx;
    case LAYER_CRT:
        return m_region_crt->mx;
    }