How would you personally identify workstation by MAC address if there are several Ethernet adapters?

I have to identify workstation by unique identifier that must be stable. I decided to use MAC address but what shall I do if there are several ethernet adapters (some of them may belong to VMWare installed)? Wich one shall I choose?

I use GetAdaptersInfo function and deal with IP_ADAPTER_INFO structures.

May be you shall choose another approach to unique (and stable) workstation ids than using MAC addresses?

It's a pitty - workstation for me is "read-onl开发者_JS百科y". I can't automatically generate some unique identifier to create, store and reuse on workstation.

If you're bent on MAC addresses, how about either select just the first MAC address in the list, or XOR them together?

However, I'm sure Windows has some GUID for the computer itself somewhere, which might be more along the way Microsoft intended things to work?