Is there a script to determine which PS or ID on the taskbar is the current window (active state)?

Is there a script to determine which PS or InDesign on the taskbar is the current window (active state)?

I need to switch operations back and forth between PS and ID, and when I'm done storing the image and go back to ID, I want ID to update the image.
The ID forum has been asked and it doesn't seem to work.
Maybe there is a high level expert here.
Can tell me the current window is ID or PS.

Thank you very much.