[This is preliminary documentation and subject to change.]
This method retrieves the value of the Enabled property.
HRESULT get_Enabled(
  BOOL *pfEnabledRet  // pointer to flag indicating whether this 
                      // filter is enabled
);
 Returns an HRESULT indicating success or failure.
The Enabled property specifies whether Announcement Listener is to call this filter when a new announcement arrives. A filter may be disabled but still reside in the filter list.