I am trying to hook up my sons desktop to a wireless network. It is a Dell and should have a wireless card. How can I figure out if it really does.

There are basically two ways in which you can determine if your personal computer has a wireless network card or not.

The first way is to go to My Computer on the desktop. Then you have to right-click on the Properties option and click on the Device Manager Button in the System Properties. Inside this option you will find another option of Network adapters, under which there is an option called Network Connection [for example, Intel (R) PRO/100 VE Network Connection]. You can click on that to check if your computer has a wireless network card or not.

The second way is to go to My Network Places, click on Properties, go to the Network and Dial-up Connections and check if there is an option called Wireless Area Network (WAN) Connection or not.