How do I connect a pc to the internet via a laptop that is connected wirelessly to a router?

How do I connect a pc to the internet via a laptop that is connected wirelessly to a router?

I have a netbook running windows xp home. It's connected to a router wirelessly and works on the internet. I have a desktop PC that is hooked up to it via ethernet. I would like to use internet on the desktop PC, via the netbook, but neither ICS nor network bridging have helped. Is is possible to achieve this feat, and if so what settings do I have to use?