How do I find the correct subkey strings to use for the various root key constants of Open Registry Key.vi?

[Monger41]

For example, what subkey string do I need to use with HKEY_Current_Users (root key) for Open Registry Key.vi to find the current user?

[Matt_K]

The subkey is something you will need to know. In order to find what keys do what you have a few options from my experience:
1. Search the web for the information on the particular key you are looking for.
2. Wade through the registry looking for the particular piece of information.
3. Get your hands on a book that discusses the registry in detail.