The NI knowledgebase (20KCIS7Z) adresses how to use an HPIB board from within LabVIEW. The article (URL below) was found by searching the Knowledgebase for "hpib and labview"
http://digital.ni.com/public.nsf/3efedde4322fef19862567740067f3cc/e56d3d4866be0a8a86256942006626f0?OpenDocument&Highlight=2,hp,gpib