Connect laptop to printer using a wireless network

I have a printer connected to a desktop in my son's room. I most often use the laptop and would occasionally like to print. As it stands now, I have to save the document on a USB memory stick and physically take it to my son's computer and then print from there. Is there a way to hook up my laptop to the printer. The printer uses a usb cable to connect to the desktop. I am not very computer savvy and would like to set this up if it is not too complicated. Thanks

What I forgot to mention is if it makes any difference if the desktops (one connected to the printer and has a wireless card and another in the basement connected to the router) are running Windows XP and my laptop is running vista.

Hi jayp. There is a lot of information available on the internet on how to share printers in XP and Vista.

Here are a few.

Share Your Printer Over a Home Network Using Windows XP
Vista share an XP printer

Here is a Google response page when I searched on share printer xp vista

If they don't give you what you need, please post back and I'll see if I can help.