U0 DrawIt(CTask *,CDC *dc)
{
    I64  i, j;
    U16 *ptr = gr.win_z_buf;
    dc->color = BLACK;
    GrPrint(dc, 0, 0, "Move the windows around and watch.");
    for (i = 0; i < TEXT_ROWS; i++)
        for (j = 0; j <TEXT_COLS; j++)
        {
            dc->color = *ptr++ & 15;
            GrPlot(dc, j, i + FONT_HEIGHT);
        }
}

U0 ScrollBars()
{
    SettingsPush; //See SettingsPush
    DocClear;
    Fs->draw_it = &DrawIt;
    CharGet(, FALSE);
    SettingsPop;
}

ScrollBars;