I'd like to access the file properties of non-office files.
I've got drawing files, pdf, and several other formats.
It's got to be some sort of generic way to edit the custom value of the file.

i.e. right click a file, properties, summary tab, title, subject, author,
category etc.... sometimes I get a custom tab with additional values..

I'd like to be able to read and write to those fields in a file. I believe
it the metadata of a file.

Can someone lead me in the right direction here?