Security Basics: Mcafee and Norton Anti Virus definition version

[Abhinav <kabhinav () gmail com>]

Hello List
I  am trying to programmitically find out the virus definition version
of the anti -virus software installed. The two anit-virus we use in
our company are from Norton and Mcafee.
Is there a registry key/or windows api/WMI call that I can use which
can provide me this information?

Thanks
-Abhinav