XnView Software

I tripped-over a clue !
(from the Linux console:) xwininfo -name "/home/tom/Desktop/Utah.jpg - XnView MP"
( ---no response--- ) That's the problem,,, because the TITLE is bass-ackwards !

XnView does not exist, UNTIL you open a file !
Explain:
Other programs differ,,, most keep the name first ...

Some years ago, using WinBatch (scripting language(like Python)) to 'screen-scrape' and gather resolution, margin size, and other info before displaying, the viewer (XnView) then prompted you that this image "needs attention".
The prompter showed a GRID marker for every test. Dimensions, Resolution ...

When is the filename ''added" into the window title ? Before or during the user viewing ?
Same question,,,,,,,,,,,,,,,,,.,,,, into the .INI file ?

I need to find the FASTEST method to acquire the filename being viewed.
While the operator is viewing the file, a 'pop-up-menu' is generated of other ...