Format String Valid VI?

[bbean]

Does anyone know if there's a VI hidden away in the LabVIEW directory somewhere that returns whether a Format String is valid eg the "Valid" Boolean on the screenshot ?

I'm terrible with regex but I can get an AI code generator to make a regular expression but I'd rather just use a LabVIEW built-in VI to be "safe".  FYI this is the regex generated by AI if anyone cares:
%(?:\d+\$)?(?:[-+#^0])?(?:\d+)?(?:[._]\d+)?(?:\{[^}]*\})?(?:<[^>]*>)?[a-zA-Z%]

 

[Zou]

C:\Program Files\National Instruments\LabVIEW 20xx\resource\PropertyPages\Pages\Format & Precision\pp_SetControlF&PString.vi

Valid if no error.

 

[viSci]

Or this...