[Joe Ross]

Originally Posted by pastelpony

Is the microcontroller an Arduino? If so, there is an Arduino interface for LabVIEW that you can use. http://sine.ni.com/nips/cds/view/p/lang/en/nid/209835

Have you used the LabVIEW Arduino interface? It's designed to take over the Arduino completely and read data from the arduino to LabVIEW for processing. It isn't designed to provide an interface for talking to an existing Arduino program. I don't think it will help.