The corresponding VS9 file is generated from netfw.idl and provides the following interfaces.
INetFwRemoteAdminSettings
INetFwIcmpSettings
INetFwOpenPort)s)
INetFwService(s)
INetFwAuthorizedApplication(s)
INetFwRule(s)
INetFwProfile
INetFwPolicy(2)
INetFwMgr
This is needed for cross-compiling mDNSResolver, so +1.