Microsoft Windows CE 3.0  


This is retired content. This content is outdated and is no longer being maintained. It is provided as a courtesy for individuals who are still using these technologies. This content may contain URLs that were valid when originally published, but now link to sites or pages that no longer exist.

This message is used in an MMDRV_MESSAGE_PARAMSstructure passed to the WAV_IOControlfunction to request a waveform input driver to return the current input position within a waveform. The input position is relative to the first recorded sample of the waveform.


Device identifier — 0, 1, 2, and so on — for the target device.
Specifies this message.
Specifies a device instance identifier.
Specifies a pointer to an MMTIMEstructure.
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.


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 does support and changes the wTypemember accordingly.

The position is reset to 0 when the driver receives either of the messages WODM_OPEN or WODM_RESET.


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.