In this post, you’ll learn more about the Error COMADMIN_E_EVENTCLASS_CANT_BE_SUBSCRIBER – 0x8011044E that is returned when working with the COM-based APIs in Win32
Win32 COM Error
COMADMIN_E_EVENTCLASS_CANT_BE_SUBSCRIBER – 0x8011044E
Win32 COM Error Error Description
An event class cannot also be a subscriber component