Network - vista to windows xp

Hi
Hope someone can help me...

I'm not sure on how i can connect my vista pc, to xp pc that has a printer. It would be good if this was possible and would make life easier when i wanted to print something or even copy files 2 and from.

Both computers connect to the same wireless modem, is there away that i can connect through that?

Thanks

Let me know if u want any other info