User active window (1 reply)

Hi Everyone,

Can someone help please - On a C/S application, I have some windows that can be run by only one user at a time. I tried this by recording the user and window in a file and delete it when the user exits the window, but will still have the record there in case the system crashed. So ideally I would like to check at he beginning of the window if another user is busy accessing the window without using a log file. Has anyone done this before? WD21/22. Thanks