Hello, Are you trying to use the Opto22 drivers? You can find such information here. If you are trying to call dll's in LabVIEW you should take a look at this link.
Let us know how this goes.
Christian A National Instruments Applications Engineer
Hello you will have to obtain that information from the manufacturer of that device. They should have example code and you can use that to set up your application in LabVIEW
Christian A National Instruments Applications Engineer