These are done by thousands every day. You pick up a "Wifi Router" at the store and read the directions.
Try http://www.linksys.com and http://www.dlink.com since both answer advance questions for those that must research this common setup.
HI. I hope someone can help me. I have an Apple eMac running system 10.3.9, and an HP running Windows XP. I really need to know what I need to create a wireless network situation to share my DSL connection. Please advise on equipment necessary, and if known, how to install said equipment. I have the ability to do so, just need the knowledge.
I appreciate anyone's advice/assistance.