Hi Scan-man,
The following KnowledgeBase article says, "NI-IMAQ for USB Cameras is a free software driver for acquiring images from any DirectShow imaging device into LabVIEW. These devices include USB cameras, webcams, microscopes, scanners, and many consumer-grade imaging products. With the driver, users can configure their device, and acquire images into LabVIEW."
This KB offers lots of helpful information, so that's where I would start.
Hope this helps!
Drew Pierce | District Manager, Central Texas | National Instruments