boolean WAC_Prev (integer $InstanceID)
|InstanceID||ID of the controlled media player|
|If the command succeeds, it returns TRUE, otherwise FALSE.|
Goes in the internal playlist in Media Player with ID InstanceID back a title. If the playback is already started, the new current track will be played from the beginning after the retreat.
If the playlist is empty, an error message is generated.
If the playlist has reached at the beginning, the current track will be played from the beginning.