Actually, you will need a USB driver for the camera. There are several third party organizations which make such drivers. For example, Inventeering.com has an ActiveX Control that interfaces to USB Cameras, as well as LabVIEW examples. You might also check out http://www.geocities.com/irene_he/IVision.html or Peter Parente's webcam drivers (www.mindofpete.org).
For more information, you may want to post this question on the Vision discussion forum. Here's an example of a thread from that forum on USB cameras: http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RNAME=ViewQuestion&HOID=5065000000080000009B7E0000&ECategory=Vision I hope this helps! Best regards, Dawna P. Applications Engineer National Instruments