This is the file that is visible. But from this file, you should be able to print the invisible window without having to open it.

Toward this end, I'm trying the script as choice #1 (with invisWin reference), choice #2 (with invisWin reference and if clause), or choice #3 (with frames[1] reference).

Then there's which uses the frames[1] reference in a script, or which uses the invisWin reference in a script.