Hi,
I did a quick search and found these two thraeds that discuss ActiveMil. Hope that they will be useful to you.
http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RNAME=ViewQuestion&HOID=506500000008000000132A0000&ECategory=Vision
http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RNAME=ViewQuestion&HOID=506500000008000000FD500000&ECategory=LabVIEW.LabVIEW+General
Regards,
Ankita A.