Can't Get Internet Connection

Hi Guys - I recently just reformatted my hard drive and just reinstalled Windows XP Professional. Not I cannot get an internet connection set up. Not sure if I'm describing this correctly but there no longer a wireless connect detected on my toolbar or anything like that. It seems that either my internal modem or internal wireless card is not being detected by windows. Maybe something to do with not having drivers installed now.. Any help would be really appreciated. Thanks guys.