If you are using an NI-GPIB board, LabVIEW has a simple set of gpib functions available in the Instrument I/O >> 488 palette. Also LabVIEW and the GPIB driver are shipped with several examples demonstrating simple GPIB applications.
Alternately, if you are using a third-party board, you can either use a VISA distribution compatible with the board or use Call Library Functions to directly access the driver of the GPIB controller. Documentation of the dll should be provided by the vendor.
Ryan Mosley
National Instruments, Applications Engineer
http://www.ni.com/exchange
