In Win 98, you can go to START > RUN, type in "winipcfg" and hit enter. Your IP will be given as well as some other information. In Win NT, I don't know how to do it other than to use another program.
I recommend StayAlive Pro. It keeps your connections alive and prevents disconnects due to inactivity. It can also click OK or whatever if aol asks if you want to stay online. Of course, this works best with dial-up. It also gives you useful info such as your IP address, connections speed, Time Online, Upload Rate, Download Rate, etc. Obviously, the main feature you are looking for here is the IP address capability. The download is less than 1.5 MBs, so it won't take long. Hope this helps! :-)
http://download.cnet.com/downloads/0...st-7-2.2276896