How do I wirelessy connect my computers?

I have a macbook and a power mac. They are both connected to the internet thru an airport.
Is there a way to connect the two computers through a network so that if I am on the macbook, I can have access to files on the macpro and vice versa. I do not want to connect the two computers with a cable.
I think I can do this by creating a network, but I am not exactly sure what this means or how to do it. Also , I do not want other people to be able to access these files.
Any help would be great!!

benjbenj, Welcome to the discussion area!
The good news is that you already have a network set up!
To see the files on the MacBook from the Power Mac, on the MacBook open the Sharing preference pane and enable Personal File Sharing. To get to the files from the Power Mac, on the Power Mac go to Finder->Go->Connect to server and select the MacBook. Then you will need to use the username and password for a user defined on the MacBook to log into the MacBook.
To access the files on the Power Mac from the MacBook, do the same steps above but switching which computer you are doing it with.

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