Is there a Plantronics Status Indicator API available for Windows COM Service

Hello, our Application ProCall is using the Windows Plantronics Hub COM Service to access the buttons and status of the Plantronics headsets. We're using the session manager (the call control interface is not used). This works very well for all Plantronics headsets and hands free devices.  My question now is, how can I implement the Plantronics Status Indicator to show the current presence state of the user? It's not only the Plantronics headset state (e.g. in a call, ringing etc.), but is't also the ProCall user presence state (e.g. busy in a meeting, absence, dnd, ...) we should show. The Status Indicator might be connected while a headset is running or it might be running as a stand alone device. I have tried the Companion App to play around for demo purposes, but it doesn't mirror the headset state to the Status Indicator for some reason. Anyway, we need to control the device by the ProCall application. Do you have some advise how to implement that? Best would be to have a sample code and the related API documentation (using Plantronics Hub if possible). The source code of the Companion App would also do the job. Thanks and best Regards, Rainer