The USB-6008 is supported by both DAQmx and DAQmx Base, so you can
definately use a USB-6008 with Visual Basic 6 through the DAQmx
API. Information on how to get started can be found at this link:
http://digital.ni.com/public.nsf/websearch/B22FE2B0F9C8935286256E920073DA07?OpenDocument
While the DAQmx driver is the preferred API under Windows, you may also
use the DAQmx Base driver with VB 6 if you prefer. It is slightly
more work to set up however. Instructions on how to do that can
be found at the following link:
http://digital.ni.com/public.nsf/websearch/A21A013CA229A5988625703E0025A8AE?OpenDocument