Hi,
We have some very good articles on this in our knowledgebases.
Look at http://digital.ni.com/public.nsf/websearch/E56D3D4866BE0A8A86256942006626F0?OpenDocument
and
http://digital.ni.com/public.nsf/websearch/3B3626D9C1F999218625694200791AD7?OpenDocument
for more details.
Best Regards,
Aaron K.
Application Engineer
National Instruments