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This message is used in an MMDRV_MESSAGE_PARAMSstructure passed to the WAV_IOControlfunction to request a waveform output driver to stop sending output data and return all output buffers to the list.
Parameters
Return Values
MMSYSERR_NOERROR indicates success. Otherwise, the driver returns one of the MMSYSERR or WAVEERR error values declared in the Mmsystem.h header file.
Remarks
The ACM sends this message by calling the audio driver's WAV_IOControlentry point through the DeviceIoControlfunction.
If the driver's output queue contains any output buffers whose contents have not been played, the driver sets the WHDR_DONE flag and clears the WDR_INQUEUE flag in each buffer's WAVEHDRstructure. The driver then sends the ACM a WOM_DONE callback message for each buffer.
The driver should reset its position count to 0. If playback is paused, the driver takes itself out of the paused state.
Requirements
Runs on | Versions | Defined in | Include | Link to |
---|---|---|---|---|
Windows CE OS | 1.0 and later |
Note This API is part of the complete Windows CE OS package as provided by Microsoft. The functionality of a particular platform is determined by the original equipment manufacturer (OEM) and some devices may not support this API.
See Also
Last updated on Tuesday, July 13, 2004