I don't want to speak on behalf of tn5250, but having written an emulator of my own I may be able to shed some light on this topic. Warning: The following is a bit of a guess. Certain command or "Order" implementations are optional: http://publib.boulder.ibm.com/cgi-bin/bookmgr/BOOKS/CO2E2001/15.6.3 I beleive it is a subcommand of the "Write To Display Structured Field Order" which is responsible for setting up a field with field masks. These commands are not required and a pain to implement. Therefore they are missing from several emulators. I have used some little tricks in my own emulator to avoid implementing these commands. One is, if there are any illegal characters in a field (such as '/' which is illegal in a Numeric field), I just assume they must be seperators/masks. Just my two cents. Which emulators do you have that it works in? Client Access and ___ ? -Mark "Marc-Antoine Ruel" <maruel@xxxxxxxxxxx To: "Linux 5250 Development Project" <linux5250@xxxxxxxxxxxx> .com> cc: Sent by: Subject: [LINUX5250] Field mask linux5250-bounces@x idrange.com 21/07/2003 09:53 AM Please respond to Linux 5250 Development Project hi I got this comment from a user of the ActiveX. Is this a generalized problem? Or isn't it? I don't have access to an AS/400 so I can't reproduce it. There is a special field, sometimes referred to as a field mask. It allows us for example to define an 8 digit date field and specify "/" as a separator. Both of our emulators support this by either showing the separator and protecting it so the cursor just skips over it, or they leave it blank but also skip over it. Marc-Antoine Ruel, ing. jr. _______________________________________________ This is the Linux 5250 Development Project (LINUX5250) mailing list To post a message email: LINUX5250@xxxxxxxxxxxx To subscribe, unsubscribe, or change list options, visit: http://lists.midrange.com/mailman/listinfo/linux5250 or email: LINUX5250-request@xxxxxxxxxxxx Before posting, please take a moment to review the archives at http://archive.midrange.com/linux5250.