The main instrument driver page is
here. It would be nice if you provided the maker of the instrument and what type of instrument it is. In cas you can't find it, you have a few options. One, you can contact the vendor and see if they have one. Two, you can submit a request for NI to create the driver. The link is on the page above. Three, you can use the Instrument I/O Assistant to read and write data. You will need the instrument manual with it's programming commnads. There is a link to a demo on the above page. Four, also with the manual, you can write your driver. In the 'Develop' section of the above page, there is information on how to do that. It's really not that difficult and new versions of LabVIEW have a wizard to get you started. Fifth, you can hire someone to write the driver for you. Under the 'Other Driver Resources' section, there is a link to Alliance Members that do this.
