RE: How to determine if device is 27x132?

There is an API I believe, but what WRKDBF does is very simple in that it
attempts to do a "user open" on a 27x132 display file.  If the open fails, I
assume that the device must be 24x80.  Works like a charm!

William K. Reger
Senior Project Manager
Levitz Furniture Corporation
Phone:  (561) 994-5114
E-mail:  breger@levitz.com <mailto:breger@levitz.com> 

                -----Original Message-----
                From:   Richard Casey [mailto:casey_r@popmail.firn.edu]
                Sent:   Wednesday, February 09, 2000 3:52 PM
                To:     MIDRANGE-L (E-mail)
                Subject:        How to determine if device is 27x132?

                I'm working on a program that switches the display from
24x80 to 27x132 
                depending on the view option that the user selects.
                Using the DSPSIZ parameter in the DDS for the screen and
setting the 
                appropriate indicator before doing a WRITE works just fine.

                If the user is working from a 24x80 only terminal, I need to
limit the view 
                option that they can select; otherwise I get an error on the
WRITE (in 132 
                column mode).

                Other than retrieving the device characteristics of the
user's terminal 
                device, is there an easy way of determining if the user's
terminal is a 
                27x132 device?
                Are 24x80 terminals always device type 3179 and 27x132
terminals always 
                3477 device type?

                Thanks in advance!

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