Hi,
It is not clear to me to what exactly are you trying to communicate or control. Is it a PCI board?.
LabVIEW has several options to communicate with external device or applications.
Assuming the device uses a device driver, this driver will most likely provide language interface files for C, in the form of a dll. LabVIEW has a Library Function Call Node that allows you to call C functions from LabVIEW. You can them wrap the function calls in VIs that you can use in your application VIs.
Check the
LabVIEW Support page for more info.
DiegoF
National Instruments.