SNMP OID Question

I am develop a firmware to RCM3700 with snmp support and DC9.25

In the test porgrams i can see some variables into SNMP manager. This variables are under
But i need set some standard variables as sysDesc, sysContact, sysName and more that are under…mngmt.mib-2.system, for example (this is sysDesc).

I understand how work snmp lib with variables under my enterprise number, i usefor example.

p = snmp_append_parse_stem(p, “1.2”)

But i do not find how to point to an OID beginning from the top of tree.

Have you some ideas for do this ?

thank you

I was wondering the same thing about how to access the management portion of the oid. Have you been able to figure this out yet?