Where are environment variables stored in registry?

I need to access an environment variable remotely. To do this I think the best way is to read it from registry.

Where are environment variables stored in registry?

From stackoverflow

• Here's where they're stored on XP and Vista:

  User Variables: HKEY_CURRENT_USER\Environment

  System Variables: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Environment

  Here's a good article on this with other links:

  http://vlaurie.com/computers2/Articles/environment.htm