U0 InSetMouseDemo()
{
        I64 t, l;

        WinBorder(ON);
        l = Fs->pix_left + Fs->scroll_x;
        t = Fs->pix_top  + Fs->scroll_y;
        MouseSet(,,, FALSE,FALSE); //Mouse unclicked
        InSetMouse(,l - 4, t - 4);
        InSetMouse(20, l + 20, t + 20,, TRUE);
        MouseSet(,,, FALSE, FALSE);
}

InSetMouseDemo;