How do I catch an error popup that appears... Asynchronously?

So, moving along in my tests, All is going swimmingly,  Hamsters are running full tilt, data is being processed, when suddenly...

That's not good.

ESPECIALLY since the application sometimes continues running for a while... (This error pops on any issue, sometimes the issue is from a SP that is running asyncronously)

So,

I need to create a kind of... "Watch" process... If this window EVER appears, stop what you are doing and handle it

THe Object itself shows as

And, for further "Identification", I can "look" at this:

Before I go into what I need to do IF I encounter the object... I need to know HOW to "Catch" it