.pidl = CSIDL_NETHOOD gets you a little closer.

I think it may be closer to what you want. There is no CSIDL_NODENAME or CSIDL_MYDOMAIN constant, which is what you would have to have to start with a domain server-centric view of a domain.

I don't know anything that will actually help. MSDNdoesn't have anything I can find either. Interesting question....