Re: Keeping Track of Windows

>From: Stephen.Foster@newcastle.ac.uk (Stephen Foster) >Subject: Keeping Track of Windows >Date: Tue, 8 Mar 1994 11:00:38 GMT >X-Informix-List-Id: <news.5806> > > I'm using Informix 4.1 RDS on SCO Unix 3.2.4, my problem is I call a >function to display information in a status window which is open all the time. > > The problem is I call this from many different windows and I need to >know from which window or function the call was made so I can return >to the correct window. Four or five windows are open on the screen at >once and I need a method of deciding which window to make current >after displaying the status message. > > Is there an easy way to solve this problem? Succinctly: No. To do anything would require some C functions to be called to keep track of windows as they are opened and closed. These might make use of the undocumented global _EFwindow *topwin (this does not constitute documentation), and they might make use of the C generated for the 4GL statement CURRENT WINDOW IS xyz to achieve the desired result. Such code might break if Informix changed it's implementation at some future date, but that is fairly unlikely. What I'd do is revise the code which displays to the status window so that it recorded the current window (a C function), switched to the status window, did the display work there, and then restored the previous current window (another C function). Yours, Jonathan Leffler (johnl@informix.com) #include <disclaimer.h>