I can't figure out what they are doing with these shared variables

[David99999]

This is from the CompactRIO example provided by NI in LabVIEW 2020, called "LabVIEW FPGA Control on CompactRIO".

I'm basically just reverse engineering the example so I can apply it to my own project, but I can't figure out what the heck they are doing with these shared variables. 

They are writing to them in this subVI, but I can't find where they are reading from them. And I don't see any spooky streaming or anything going on where the reading might be "invisible" or hidden. Surely they are reading somewhere....what would be the point of writing to them?

[Gregory · Accepted solution]

Is there a "UI Main VI" in that same project?

[David99999]

Ah crap. Ok. I looked at that, but I was expecting to find shared variables that looked the same, but in read access mode. Now I see the the read variable functions

Never seen it done that way before! I wish the courses I've done just started out explaining it do it this way. I've basically been coding like a Neanderthal. But I guess that's my fault for not going further into the courses

[Gregory]

Yes, you will learn many nuggets along the way that make something easier and you wish you had known it all along. There was a thread with many great, random nuggets in it: https://forums.ni.com/t5/LabVIEW/Micro-Nuggets-Post-em-if-you-got-em/td-p/1276066?profile.language=e...