How to Install the LIS3MDL Library for Arduino?

[zoezz]

Hello all, I’m doing a project about installing the LIS3MDL 
Library for Arduin. I bought a LIS3MDL magnetometer after reading 
a detailed introduction article about this device, here's the 
link: 
https://www.apogeeweb.net/circuitry/lis3mdl-magnetometer-datasheet-features-pinout.html
It doesn’t mention how to install the Adafruit LIS3MDL Library 
for Arduino...so I try myself.
The problem is, that i don´t get correct values.
Maybe I have mistakes in the setup part of the sensor?
Can anybody helps?