I added some Environment Variables to my Windows operating system recently (right-click on My Computer, Properties, Advanced, Environment Variables). I was wondering if there is any way from an existing Command Prompt to pick those up. I know that all Command Prompt instances after this point will have those new environment variables defined, but I was just curious if there was an easy way to get an existing Command Prompt instance to "re-source" its environment variables.
On the other hand, is there any way to add a System Environment Variable to Windows from the command prompt?