Dear @VIVE_chengnay - thanks for the fast reply. We want to read out exactly these two events. So far, we don't get any events as soon as we put on or take off the headset.
But we do get the 1000 event, for example, when we close the application.
Inside our WaveVR Pawn we add a the WaveVREventCommon and then listen to the OnAllEvent BP. I attached a screenshot.