Hi Rebecca,
There are several drivers for other Advantest products in NI's Instrument Driver Network, however I didn't find any driver that specifically matched the R6243/6244 voltage/current generator, and I didn't find anything on Advantest's site that could point me to a quick solution for you. Unless another user has developed a driver that they could give you the code for, it looks like your best bet from this point is going to be to request a driver, if you haven't already. You can do this by going to the Instrument Driver Network, and following the link to "Request Drivers". Hopefully this helps you on your way. Good luck!
Logan S.
