Thanks for the replies. Yeah, i realized this after trying different stuff in code. I initially though that it would be set in the PhidgetDistanceSensorHandle since the function is called with a handle, and that it would then automatically know that it was set when the phidget attaches. But phidget ...

According to the API the sonar (DST1200_0) operates in quietMode as default. So i wanted to set it in loud mode, however it seems no matter what i tell PhidgetDistanceSensor_setSonarQuietMode to do, the sonar stays in quitMode, also i am unable to fetch the value with PhidgetDistanceSensor_getSonarQ...