This method pauses playback of the current subqueue without flushing
the audio buffer or otherwise affecting the subqueue.
This method has no effect if playback is paused
or stopped.
Notice that Pause() is a synchronous method
with a return value.
While playback is paused, Start calls to playback
(on a prompt or the PromptQueue)
have the usual effects of subqueue delimitation and scheduling, but
playback remains in a paused state (until Resume
is called).
Syntax:PromptQueue.Pause();
Parameters:none
Retrun Value: 0 for successful pause, -1 for failure