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WODM_CLOSE (Compact 2013)

  • Article

3/26/2014

This message is used in an MMDRV_MESSAGE_PARAMS structure passed to the WAV_IOControl function to request a waveform output driver to close a specified device instance that was previously opened with a WODM_OPEN message.

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 WAVERR error values declared in the Mmsystem.h header file.

Remarks

The waveform API manager sends this message by calling the audio driver's WAV_IOControl entry point through the DeviceIoControl function.

If the client has passed data buffers to the driver by means of WODM_WRITE messages and the driver has not finished sending the data to the PDD, the driver returns WAVERR_STILLPLAYING in response to this message.

After the driver closes the device instance, it sends a WOM_CLOSE callback message to the waveform API manager.

Requirements

Header

mmddk.h

See Also

Reference

Waveform Output Driver Messages
WAV_IOControl
MMDRV_MESSAGE_PARAMS