void win2_showChart(Fl_Widget *w, void *data)
{
    win2_accountNo_callback(win2,&xNull);
    for (int k;k<1000000;k++){;}

    win2_tabs->hide();
    win2_chart->show();
    win2->redraw();
}

win2_accountNo_callback sets a new value for FL_Output, however unless I put in the "timer" to "slow something down ??" it will not display correctly. I thought that's what win2->redraw was supposed to do ?

Cheers

Roger