C++ SNMP Extension Agent - how to work with AsnSequence?

Greetings gentlemen!
What I need is to create SNMP agent for monitoring our software systems.
I’m using "winsnmp" for writing my SNMP Extension Agent in Visual C++. The output is x64 DLL, which is registered in Windows registry, loaded by "SNMP Service" and properly executed. My SNMP agent is able to handle "SNMP_PDU_GET","SNMP_PDU_GETNEXT", "SNMP_PDU_SET" requests as well as generate SNMP Traps.
Things are great so far, everything is working great.
But now I need to handle complex data type "sequence" which is presented as "AsnSequence" type or "ASN_SEQUENCE" type constant in "winsnmp". The requirement is to reply to SNMP manager with table, containing multiple records. The table has specific structure, here’s the sample MIB fragment:

  hrTestTable OBJECT-TYPE
    SYNTAX     SEQUENCE OF HrTestEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION"sequence"
    ::= { BMS_ibm_wsmq 3 }
  hrTestEntry OBJECT-TYPE
    SYNTAX     HrTestEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION"Table row"
    INDEX { hrTestIndex }
    ::= { hrTestTable 1 }
  HrTestEntry ::= SEQUENCE {
    hrTestIndex Integer32,
    hrTestType AutonomousType,
    hrTestDescr DisplayString
  }
  hrTestIndex OBJECT-TYPE
    SYNTAX     Integer32 (1..2147483647)
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION"indexColumn1"
    ::= { hrTestEntry 1 }
  hrTestType OBJECT-TYPE
    SYNTAX     AutonomousType
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION"column1"
    ::= { hrTestEntry 2 }
  hrTestDescr OBJECT-TYPE
    SYNTAX     DisplayString
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION"column2"
    ::= { hrTestEntry 3 }

Once entire table is requested by SNMP manager, the agent receives "SNMP_PDU_GETNEXT" request:

BOOL SNMP_FUNC_TYPE SnmpExtensionQuery(BYTE operation, SnmpVarBindList *variableBindings, AsnInteger32 *errorStatus, AsnInteger32 *errorIndex) {…
 for (unsigned int index = 0; index < variableBindings->len; index++) {
  *errorStatus = SNMP_ERRORSTATUS_NOERROR;
  switch (operation) {…
   case SNMP_PDU_GETNEXT:
    …
    *errorStatus = GET_SEQUENCE(&variableBindings->list[index]);…
   …
  };
…

Variable
"&variableBindings->list[index].name" points to "hrTestIndex" at "index=0"
"&variableBindings->list[index].name" points to "hrTestType" at "index=1
"&variableBindings->list[index].name" points to "hrTestDescr" at "index=2"
For all these cases "&variableBindings->list[index].value. asnType" is "ASN_NULL"
I suspect, that producing response "&variableBindings->list[index].value.asnType" has to initialized with "ASN_SEQUENCE" and "&variableBindings->list[index].value.asnValue.sequence" should be initialized with "AsnSequence"
So, am I right? How do I initialize instance of "AsnSequence" and fill it with data then?

Thanks.

nya-nya!