WODM_RESET

This message is used in an MMDRV_MESSAGE_PARAMS structure passed to the WAV_IOControl function to request a waveform output driver to stop sending output data and return all output buffers to the list.

Parameters

uDeviceId

Device identifier—0, 1, 2, and so on—for the target device.

uMsg

Specifies this message.

dwUser

Specifies a device instance identifier.

dwParam1

Not used.

dwParam2

Not used.

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_IOControl entry point through the DeviceIoControl function.

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 WAVEHDR structure. 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.

See Also

WODM_WRITE