Accessing/ Sharing Two computers with common Internet Connection

[Tayyab]

I have a DSL internet connection serving a laptop and a desktop at home. The laptop is connected through a wi-fi whereas the desktop through network cable. Under the same hardware, how could I share files, folders or hard drives on one computer with the other? Thanks.

 

[gtvr]

What OS - Windows? Mac?

I bet you could google "file sharing windows XP home" or "file sharing Mac OS x" and find good info.