Sync the mute/unmute status to HID device

Hi everyone,

I would like to develop a HID device with LED indicator, it can show the mute/unmute and camera on/off status with different colors, of course the device also able to trigger mute/camera on or off by sending keyboard shortcut.

My question is : if user triggers the mute/camera function by mouse click or keyboard, how can I know the mute status and update the HID device status?

Is there any standard API to do it? or it needs to write a plug-in ?

Thank you very much!