WQL Dell Bios

Hi there;

I would like to be able to create reports or queries in SCCM 2012 that gather various information from the Dell Bios.   Our computers are primarily OptiPlex 380 and 390s.   I'd especially like to gather the asset tag from the systems bios. 

Can someone point me to some resources that will help me figure out what I want to do?

All and any comments greatly appreciated.

WD