WODM_GETNUMDEVS (Windows Embedded CE 6.0)
1/6/2010
This message is used in an MMDRV_MESSAGE_PARAMS structure passed to the WAV_IOControl function to request a waveform output driver to return the number of device instances that it supports.
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
The driver returns the number of waveform output device instances it supports. For Windows Embedded CE, the default MDD returns 1.
Remarks
The waveform API manager sends this message by calling the audio driver's WAV_IOControl entry point through the DeviceIoControl function.
Requirements
| Header | mmddk.h |
| Windows Embedded CE | Windows CE 1.0 and later |
See Also
Reference
Waveform Output Driver Messages
WAV_IOControl
MMDRV_MESSAGE_PARAMS