Enable local lan access in windows 7 while using wireless

[naif]

Hello,
My laptop has windows 7 , its connected to the internet wireless , now , i want transfer files from my desktop to the laptop so i cannect them with an ethernet cable.. now how i can make that happen , my desktop has window xp

 

[Emerald]

http://www.tomshardware.com/forum/32700-42-enabling-file-sharing-windows-windows-vista-machines