By default, Windows Vista is not set to show the Run command from the Start menu. You can change this in Vista Preferences or use Search to find the Run command.
To use the Search command in Windows Vista type:
Once you have the Run command window start with step 2 below
ifconfig -a
or, if this is not found use,
/usr/sbin/ifconfig -a
You may get a variety of responses. The one you want is one that includes the words "BROADCAST" and "inet," where "inet" introduces the IP address -- e.g.,
le0: flags=<863UP,BROADCAST,NOTRAILERS,RUNNING,MULTICAST> mtu 1500 inet 128.8.10.95 netmask ffffff00 broadcast 128.8.10.255