Dave,

https://vdf-guidance.com/ContribPage...ntribRecId=123

property pbX64
would be the one.

I'm pretty sure that Frank Cheng also has some code for this at his site if you are looking for an alternative.

Checking the registry for the WOW6432Node tree is a hack which should not be relied upon.
For kicks I just checked on a 32 bits machine down here and it HAS this tree. Part of it written by Microsoft no less (NotePad )
--
Wil