Dual Window behavior issue

Thank you for your reply. I’m still new to ignition but have some familiarity with python 3 working backwards. I’ve tried your suggestions and there are some issues but its probably because I was too brief in my description. I have a main screen which is a drum status screen which has a table on it.

The idea is, id select from this and get the first column and it would populate the box here.

I havent tried the parameter yet because I didnt know I could do that.. but I like it.

The issue I have had is when I tried your suggestions a few things happened.
First I got rid of the getwindow line in lieu of keeping the WindowInstance line thinking that in my general fatigue I must be getting redundant but while this opens the window without both lines of code on the main screen it doesn’t select the drum clicked on the other page. To have it open and to select the drum I want it seems to require that I have both lines of code right now.

Next I tried the reading and writing on the same script and using a variable. I already had a variable so I used that and I didnt need all that extra, I was over thinking it, thank you.

I commented out my code block to try the one you did. Unfortunately, while there were no errors, nothing happened. I like the way it looks though and this is a good exercise for me so I’ll see what I can do with it.

Lastly, when I ran my edited code with everything I could make work, the secondary screen for the dual monitor set up only fully works when I have my screen noting message box running It will open the window but not select the right drum . I used this for the Main screen to make sure my docks are showing up right.
Thank you again for your help so far, I’ll continue working through this and am happy for any feedback.