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4.9 oskit_listener: callback interface for event notification

    The oskit_listener interface encapsulates an event notification function. When associated with another object, the creator of the oskit_listener may be informed whenever an event occurs on that object. Associating an oskit_listener with some object is done via methods on the object. See the description of the Asynchronous I/O interface (Section 7.2) for an example use of this interface. The oskit_listener COM interface inherits from oskit_iunknown, and has the following additional method:
notify
Inform a listener that an event of interest has occurred.

The oskit_create_listener function can be used to create instances of the listener interface.





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