WshShell.ExpandEnvironmentStrings

Expand a Windows environment variable.

Syntax 
      WshShell.ExpandEnvironmentStrings(strString)

Key:
      strString is a PROCESS environment variable 
                    (enclosed with "%" characters)

Example

MsgBox "Prompt is " & WshShell.ExpandEnviromentStrings("%PROMPT%")

Note: Variable names are not case-sensitive.

"I would rather train someone and lose them, than not train them and keep them" - Zig Ziglar

Related:

Environment, Read Environment variables
Equivalent Windows CMD command: SET - Display, set, or remove environment variables
Equivalent Powershell command: Get-Item env:HOMEDRIVE or $env:HOMEDRIVE