onUserActiveAudioChange

Description
I want to use onUserActiveAudioChange to track the active speaking time of each participant. My question is how to implement such a function and where should I call it

Which version?
zoom-sdk-windows-5.4.54524.1229

Additional context
I found the function its in the IMeetingAudioCtrlEvent.
I want to know how can I use it.
Any help would be appreciated
Thanks