snmpAddVarBind parameters

varbinds: This input and output parameter is a pointer to the address of the SnmpVarBinds structure into which the new VarBind structure needs to be created. If there is sufficient storage for this new VarBind structure in the array of VarBind structures pointed to from this SnmpVarBinds structure, then the output SnmpVarBinds parameter is not changed. Otherwise, storage is reallocated for this new VarBind structure and the new pointer to the beginning of the VarBind array is stored in this output parameter. This parameter is required.
oid: This input parameter is the string representation of the OID of the VarBind structure that is to be created. This parameter is required.
value: This input parameter is the address of the smiValue structure of the VarBind structure that is to be created. If this address is NULL, the created VarBind structure will contain an empty smiValue structure.