WPDM_GETDEVCAPS

This message is passed to the PDD_WaveProc function to instruct the audio PDD to query the hardware to determine its capabilities.

Parameters

apidir

Input and output; one of the following values:

WAPI_IN

Obtain input capabilities.

WAPI_OUT

Obtain output capabilities.

dwParam1

Pointer to a WAVEOUTCAPS structure that holds information about capabilities. If this parameter is NULL, the PDD returns immediately, indicating whether the driver supports the specified direction of data transfer. For example, if apidir is WAPI_IN, and input is not supported, this function returns MMSYSERR_NOTSUPPORTED.

dwParam2

Specifies the size, in bytes, of WAVEOUTCAPS.

Remarks

This message is declared in the Waveddsi.h header file.

See Also

PDD_WaveProc