Hi ong.
IMAQ stands for image acquisition.
CW isn't a known term to me when dealing with industrial vision. (Maybe someone who reads this lights me up?)
When dealing with NI software, CW is sometimes ComponentWorks. (As I do not use Visual Basic, I do not use CW.) CW also has some support for vision - but I don't know any details.
Hope this gets you one step further, Guenter