hi ,
I have download NI-IMAQ for USB Camera driver and it work well with one usb camera.
 
But when I connect two usb camera( same brand and type), it always acquiring images from first usb camera.
 
In attached picture,I find that usb camera handle is useless. if you connect one usb camera, you choose index  to 1,2,3,4 or blank, you still can acquire image( first  time run error, second time work well , third time run error...... cycle)
 
if you have some experience on this , please give me some suggestion ,thanks
 
BR
Sonic
 


16.JPG:
http://forums.ni.com/attachments/ni/170/342083/1/16.JPG