Hello PC Programmer,
The way you would communicate with your USB device is going to be device specific. If you are using the new NI USB DAQ devices (6008, 6009), you would use the NI-DAQmx 7.5 driver to communicate with these. When you install the DAQ driver, you would choose to install support for CVI, then you would be able to use the appropriate functions included in the driver to address your hardware. If you are using a third party USB device, you would need to get a C based driver for that device from the vendor or locate it on IDNET. Then based on how the driver is distributed, you will be able to use the type library to call the functions in the driver DLL or if you receive a CVI instrument driver, you will be able to load the instrument driver in CVI and address your hardware.
Hope that helps.
Wendy L
LabWindows/CVI Developer Newsletter
