Internet Problem through a Wireless Network

Hi,

I have just been given a Dell Dimension 3000 Desktop Computer to play about with, but I want to hook it up to the Internet but I don't think it has a Wireless Modem. I use the Internet on my Laptop through a Wireless Network that I have.

Am I right in saying I will need to purchase a NIC for the Desktop for it then to connect to the Internet through the Wireless Network?

Regards