If you are looking for generic serial example programs, go to Help»Examples»I/O Interfaces»Serial»LabVIEW<->Serial. Enter the com port and set both dip switches in the up position.
If you are looking for a instrument specific driver, you may want to contact the manufacturer to see if they have a LabVIEW driver for their instrument. If they don't, you can easily create a low-level driver by configuring an I/O assistant VI for each function in the manual. I/O assistant is one of the many new features of LabVIEW 7 and will parse instrument responses for you, which makes creating an instrument driver much easier. Once you have this low level driver you can just combine functions to make higher level VIs.
