How can I read streaming USB data?

Hi,

I have a biometric device that transmits heart rate and skin response data via USB to a program that utilizes it.  

I would like to experiment with the incoming data myself.  Is there a way to read the data going back and forth through this USB device?  I'm guessing there is some info flow to the device, but that's one thing I want to find out.   I've done some searching, but I'm new to the whole external data stream thing and need some direction.

I'm open to the programming language, but I don't know how low level I need to get.

Thanks!

Running:
Windows 7
USB 2.0
Asus MoBo
LVL 11
ugebAsked:
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Dave BaldwinFixer of ProblemsCommented:
USB uses a point to point network protocol to send and receive packets from USB node to another.  This site http://www.beyondlogic.org/usbnutshell/usb1.shtml more than you probably want to know about USB 1/2.  And so will this search: https://www.google.com/search?q=USB+network+protocol

There are USB protocol analyzers.  This one http://freeusbanalyzer.com/ says it's free.

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ugebAuthor Commented:
Great, thanks!
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