Microsoft Windows CE 3.0  

WODM_GETPOS

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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 return the current position within a waveform. The position is relative to the beginning of the waveform.

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
Specifies a pointer to an MMTIMEstructure, which is described in the Microsoft Windows CE Platform SDK.
dwParam2
Specifies the size, in bytes, of MMTIME.

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 ACM sends this message by calling the audio driver's WAV_IOControlentry point through the DeviceIoControlfunction.

The wTypemember of MMTIMEindicates the time format requested by the client. If the driver cannot support the requested format, it returns the position in a format that it supports and changes the wTypemember accordingly.

The position is reset to 0 when the driver receives a WODM_OPEN or WODM_RESET message.

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.


 Last updated on Tuesday, July 13, 2004

© 2004 Microsoft Corporation. All rights reserved.