The only option currently available is the Measurement Hardware DDK - register level programming (rlp). Here is a KnowledgeBase that describes rlp and gives links to additional resources.
Measurement Hardware Driver Development Kit Register Level Programming Architecture:
http://digital.ni.com/public.nsf/websearch/1C3988D7D33B925C86256C59007FB4B4?OpenDocument.
Measurement Hardware Driver Development Kit (DDK)Product Page:
http://sine.ni.com/apps/we/nioc.vp?cid=11737〈=US
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