We used the ADXRS453 this year and wrote a class in Java to interface with it.
I've described how to use the class in another thread on CD
See the post here:
http://www.chiefdelphi.com/forums/sh...94&postcount=4
The port over to C++ should be pretty straight forward.
Feel free to contact me if you have any questions. james [at] team2168.org