Brand new file extension?

posted by  johnb (86)  14 months ago (www.vistax64.com)

I have searched all over, and found nothing.

I want to create a new file extension called "wry". And I don't really need
to associate it with anything, but in case that bit of information is
required for an answer here in this forum, let's say I want to open it with
notepad.

How to do this?

thanks,
weary