pairfind() with VSAs

[hwang at i-fone.net]

I'm trying to write my own module and come into some problems.
I'm trying to access request attributes using pairfind() as mentioned in
the Wiki.  I can get normal attributes without problem but having
problem with VSAs.
I tried to access some Cisco VSAs like h323-conf-id, h323-call-origin by
using something like PW_H323_CONF_ID, CISCO_H323_CONF_ID, H323_CONF_ID
but compiler told me those are "undeclared".
How do I access those VSAs?
Thanks.

C.C. Hwang