Is there a way to check if any given user is in the Administrator's Group?

I know how to check if the *current* user is an admin using:

```
import ctypes
print ctypes.windll.shell32.IsUserAnAdmin()

```

However if I'm logged in as userA, I want to know if userZed has admin privileges.

Any pointers or suggestions would help, it seems I can't track down any documentation on ctypes.windll.shell32.