int doWork()
{

    //UG窗口句柄
    HWND hwndUG = (HWND)UF_UI_get_default_parent();

    uc1601("最小化UG窗口", 1);
    SendMessage(hwndUG, WM_SYSCOMMAND, SC_MINIMIZE, 0);

    uc1601("最大化UG窗口", 1);
    SendMessage(hwndUG, WM_SYSCOMMAND, SC_MAXIMIZE, 0);

    uc1601("关闭UG窗口", 1);
    SendMessage(hwndUG, WM_SYSCOMMAND, SC_CLOSE, 0);

    return 0;
}