lol at all the retarded comments here!
To connect your Wii to your Laptop, you can use the following two methods.
1) Buy an RF Modulator (link and buy a TV Card, connect the Wii to the RF Modulator and then plug the Modulator into the TV Card aerial socket, then finally plug the TV card into your Computer via USB.
2) You will need a Scart/Phone to S-Video convertor (I suggest ebay), then connect your Wii via an S-Video cable to your computer, you will of course need S-Video INPUT on your computer.
Note: MOST, graphic cards have TV-OUT, S-Video-OUT, these will NOT work, as they only allow output communication. You will need a Video Capture card if you do not have an input socket.
Hope this helps
Edit: The first method is how I connected my GameCube to my laptop in my first year of Uni - so I know it works!