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4/8/2010

This message is used to query the preferred device, using the existing waveInMessageor waveOutMessagefunction to the WAVE_MAPPER device id.

Syntax 

DRVM_MAPPER_PREFERRED_GET

wParam =pDeviceIDlParam = Reserved

Parameters

pDeviceID

Pointer to the DWORD variable into which the function writes the device ID of the current preferred device. If no device is available that qualifies as a preferred device, the variable will contain -1.

lParam

Reserved; must be zero.

Return Values

One of the values described in the following table is returned.

Value Description

MMSYSERR_NOERROR

The call was a success.

MMSYSERR_ERROR

The call failed.

Remarks

DRVM_MAPPER_PREFERRED_SET and DRVM_MAPPER_PREFERRED_GET are not defined by Windows Embedded CE. To use these messages, you must first define them in your code:

Copy Code 
#define DRVM_MAPPER 0x2000
#define DRVM_MAPPER_PREFERRED_GET (DRVM_MAPPER+21) 
#define DRVM_MAPPER_PREFERRED_SET (DRVM_MAPPER+22)

See Also