How can I play C&C Generals over wireless LAN?
Solution 1:
There are a couple of methods you can try:
Make sure both of your computers are on the same network (sounds like you've tried this but it should work)
If you're not both within the one house you can use VPN such as hamachi https://secure.logmein.com/products/hamachi/
Important You must both have identical versions of Generals. I.e. if you are on version 1 (or the unpatched equivalent) then your friend must also be on the same.
Once you're both on the same network of some sort and you both have identical versions it should be as simple as creating a game in the LAN lobby. You or your friend should be able to see the game on lobby list.