ISpNotifySource::SetNotifySink (SAPI 5.4)
ISpNotifySource::SetNotifySink sets up the instance to make free-threaded notification calls through ISpNotifySink::Notify.
HRESULT SetNotifySink( ISpNotifySink *pNotifySink );
- [in] Pointer to the notification interface. If pNotifySink is NULL, any current notification mechanism (notify sink, window message, callback, or Win32 event) is removed.
|S_OK||Function completed successfully.|
|E_INVALIDARG||Interface pointer is invalid.|
|FAILED (hr)||Appropriate error message.|
If pNotifySink is NULL, any notification mechanism currently associated with this notify source is removed.
Because free-threaded notifications can occur on any thread, at any point during execution, they are extremely prone to deadlocks and re-entrance problems. See the documentation for ISpNotifySink for more details. Most applications will find one of the other notification mechanisms much easier to use.