How to send amqp:data:binary?

[Tom Mathews]

I've finally tracked down an issue between our clients and server, it seems the 
server expects amqp:data:binary payloads, but we're sending a single byte array 
as an amqp:amqp-value:* payload. How do I set this to be a data:binary payload?
 
Current code that's setting a message with an Amqp Value:
                pn_data_t *body = pn_message_body(message);

result = pn_data_put_binary(body, pn_bytes(m_dataLength, (char*)(dataPtr)));
                pn_message_encode(message, m_encodedData, &m_encodedSize);
pn_delivery_t* delivery = pn_delivery(m_senderInstance->GetSender(), 
pn_dtag(m_tag, strnlen(m_tag, TAG_SIZE)));
 
Thank you!
 
-TomM