[ubuntu] Connecting to wireless network

view story

http://ubuntuforums.org – I've just installed ubuntu on my laptop and I'm trying to connect to the wireless network that the other computers in my house are using. I tried using the ubuntu desktop guide, but when I click on the network menu, wireless networks aren't mentioned. The network menu says 'Wired Network disconnected' but I've never used a wired network. The options are: VPN connections; Enable Networking (which is ticked) and Edit Connections. The laptop connected to the network when I first turned it on, it had Windows 7 pre-installed. How do I connect to the network? (Hardware)