RE: Programs that didn't need to be written - ScreenSaver5250

Charlie Massoglia referred to it as "write under format".
I recall he mentioned he used it to pop up a screen quickly while doing a lot of requisite setup processing or other intensive processes.

Of course, this was "way back in the day".


Roger Harman
COMMON Certified Application Developer - ILE RPG on IBM i on Power


-----Original Message-----
From: RPG400-L <rpg400-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of Scott Klement
Sent: Tuesday, August 16, 2022 9:25 PM
To: RPG programming on IBM i <rpg400-l@xxxxxxxxxxxxxxxxxx>
Subject: Re: Programs that didn't need to be written - ScreenSaver5250

< snip >

The other use of INVITE is to allow the computer to continue to do
processing while the user is able to input to a display. Consider
writing something like a TELNET client where data can arrive over the
network, but the user can also type at the same time.  You would
accomplish this by writing the data you have, and displaying the screen
with INVITE (and FRCDTA).  Then the user can key stuff, but you can also
sit and look for data on a network. If the data arrives before the user
keys anything, you can update the display with the new data, and so
forth.  (You would attach a data queue to the display to get
notification when they finish entering input.)

< /snip >


On 8/16/22 3:55 AM, Patrik Schindler wrote:

Hello Scott,

Am 16.08.2022 um 06:16 schrieb Scott Klement <rpg400-l@xxxxxxxxxxxxxxxx>:

While you could use it with ACQ to handle multiple displays, that's only one potential use.

I'm wondering what a real world scenario for a multiple display invited screen would be. I'm not sure if I've asked this before. The possibility smells somewhat like CICS on MVS and successors, but I don't have any further insight into CICS.

:wq! PoC