Read acceleration and Euler angles

Hello to all,

I'm studying the library of motionapp, helping me with the documents in the download section, and I would like to know how to read the values ​​of Euler angles and accelerations. I saw that in the library ml.h there are functions that return these values ​​but did not really understand how to view them. I tried to call them directly in the command window but displays error. Can anyone help me?THANKS