The AudioOutput Object
[Microsoft Agent is deprecated as of Windows 7, and may be unavailable in subsequent versions of Windows.]
This object provides access to audio output properties maintained by the server. The properties are read-only, but the user can change them in the Microsoft Agent property sheet.
If you declare an object variable of type IAgentCtlAudioObjectEx, you will not be able to access all properties for the AudioOutput object. While Agent also supports IAgentCtlAudioObject, this latter interface is provided only for backward compatibility and supports only those properties in previous releases.