believe you will still need to use LabVIEW to set up the project, but the actual program can probably be done in C. You can find the readme in C:\Program Files (x86)\National Instruments\LabVIEW 2015\examples\motion\CInterface and also examples in directories in that same location. I've never controlled that stepper motor in C, but the readme looks like it lays it out pretty well.
