How To Read and Write with Listbox

Looking for a simple example on how to write data into a Listbox via my Block Diagram.
That indicates to me that my Listbox needs to be an Indicator (so I can write to it).
But, if my operator selects one of the items from the Listbox, I want to be able to read what they selected - so it also needs to be a Control.
Is there an example on how to do something basic like this?
Thanks.
Angus Cattle from Pool Ranch and Steel Repairs via Joe's Welding.

I'm having a horrible time getting this to work.
Attached is my attempt, but it certainly is not doing what I want.
Once this VI works, I will start trying to pull values from the database.
Any good suggestions on how to fix it?
Angus Cattle from Pool Ranch and Steel Repairs via Joe's Welding.
Attachments:
Calibration.vi ‏26 KB

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