You can use the C code and make a LabVIEW CIN or dll but neither can be made with the old LabWindow/DOS compiler. Only Visual C++ and Symantec C are supported for CIN creation. If you could upgrade to LabWindows/CVI then you could use the LabVIEW import CVI driver function or add ActiveX communication. The only other option I see is to use LabVIEW's System Exec function to run an exe. You could pass parameters using the standard input and output or external text files.
