this is how the extrawork.dll works.

blizz detects ur using teh hax or doesnt.. doesnt matter which, thet transfer a file in2 ur diablo 2 folder, and any files(hacks etc.) attatched to diablo or are using diablo get detected by extrawork and blizz gets notified by it, it send Them your IP Address, your acc details and CD-Key and which ever they want to ban for your breaking the EULA(End Users License Agreement).

i hope i put it out easy enuff to understan for u sov