How to implement C++ API for agent MIB implementation?

Hey,
 
I'd like a simple C++ API for implementing MIBs.
Basically I'd like the new API to allow an object to implement a leaf, 
meaning that the object should register for handling a certain leaf, and
it would have some predefined handle() method which will be called when
leaf processing is needed.
This would require some sort of special registration.
 
Possibilities I thought of:
1) find out if there is already a C++ API?
 
2) Use the OLD-API, and register a variableN array in which the
FindVarMethod would
    use the oid as a key to lookup an handler_object in a global
data-structure, 
    and invokes a "handle" method of the handle_object.

3) Use the new Net-SNMP handler mechanism to register a handler with
some cookie which will contain the object (this) pointer.

 
 
Questions:
---------------
 
A) Is there a C++ API for this? ( I guess not...not yet)
 
B) since possibility number 1 is a bit awkward, I'll refer to the 2nd
possibility:
    1) How do I register a handler with a cookie?
 
C) Any better Ideas?
 
thanks,
Erez.