Is it possible? Remote desktop

Hey, I have a desktop pc (XP) and a laptop (7) and I am able to access my pc from my laptop. My question is, can I use the wireless internet on my laptop while on my pc (from my laptop)?

All I need is a wireless card for my pc or the crossover e-net cable. But I'm am curious if this would work.

Thanks

two soultions

1. and best, connect all systems to a router
2. workable, chain the connections

sample(1)

Code:

ISP...modem---router --- wifi or wired connections up to four systems

sample(2)

Code:

ISP...modem---system#A --- use ICS --- system#B

(2) is more complicated and requires systemA running if systemB is to get Internet connection.
On systemA, enable the ICS feature