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This message is used in an MMDRV_MESSAGE_PARAMSstructure passed to the WAV_IOControlfunction to request a waveform input driver to return the number of device instances that it supports.
Parameters
Return Values
The driver returns the number of waveform input device instances it supports. The default audio driver's MDD layer returns 1.
Remarks
The ACM sends this message by calling the audio driver's WAV_IOControlentry point through the DeviceIoControlfunction.
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