proxyed agents and dynamic module

hello,

i need a hint regarding the use of the net-snmp agent.
i wrote my MIB, which contains 3 Integer32 variables.
the first two variables are queryed to proxyed  agents, using the proxy
directive in the snmpd.conf file.
but the third one is to be computed using the first ones, in a dynamic
module i wrote (using mib2c).

my question is: how to access the first two variables from the module?
should i make a snmp request - using netsnmp C api - from the module to the
net-snmp daemon?
can i access the variables monitored by net-snmp easily and directly?
if you have links, samples and/or ideas i d really appreciate.

thanks in advance.

regards,

--
Guillaume Desticourt