Subj : Re: Need a little help To : borland.public.cpp.borlandcpp From : Ed Mulroy [TeamB] Date : Fri May 28 2004 04:11 pm Once the user has changed the setting and your functions have altered the memory bitmap how is Windows to know that you wish that it repaint the window? Try adding these lines at the end of the DisplayCentigrade and DisplayFahrenheit functions. InvalidateRect(hwnd, NULL, TRUE); UpdateWindow(hwnd); .. Ed > Jeff Baker wrote in message > news:40b78cb1@newsgroups.borland.com... .