MMDevApi.dll

[WebAFilippov]

I use the OnDefaultDeviceChanged listener in my code.
When changing in debugging, I get
avcore\audiocore\device api\registrypropertystore\registrypropertystore.cpp (304)\MMDevApi.dll !00007FFBD3A5B76C: (caller: 00007FFB25F8A38F) ReturnHr(4) tid(25c8) 80004002 Interface is not supported by avcore\audiocore\device api\registrypropertystore\registrypropertystore.cpp (304)\MMDevApi.dll !00007FFBD3A5B76C: (caller: 00007FFB25F8A38F) ReturnHr(5) tid(25c8) 80004002 The interface is not supported avcore\audiocore\device api\registrypropertystore\registrypropertystore.cpp (304)\MMDevApi.dll !00007FFBD3A5B76C: (caller: 00007FFB25F8A38F) ReturnHr(6) tid(25c8) 80004002 Interface is not supported

What could be the reason for this?
and a small request to dilute README.md examples of method output. and a point-by-point description of the methods would be nice.