waveOutGetDevCaps

The waveOutGetDevCaps function retrieves the capabilities of a given waveform-audio output device.

MMRESULT waveOutGetDevCaps(

UINT uDeviceID,
LPWAVEOUTCAPS pwoc,
UINT cbwoc
);

Parameters

uDeviceID

Identifier of the waveform-audio output device. It can be either a device identifier or a handle of an open waveform-audio output device.

pwoc

Address of a WAVEOUTCAPS structure to be filled with information about the capabilities of the device.

cbwoc

Size, in bytes, of the WAVEOUTCAPS structure.

Return Values

Returns MMSYSERR_NOERROR if successful or an error otherwise. Possible error values include the following:

MMSYSERR_BADDEVICEID	Specified device identifier is out of range.
MMSYSERR_NODRIVER	No device driver is present.
MMSYSERR_NOMEM	Unable to allocate or lock memory.

Remarks

Use the waveOutGetNumDevs function to determine the number of waveform-audio output devices present in the system. If the value specified by the uDeviceID parameter is a device identifier, it can vary from zero to one less than the number of devices present. The WAVE_MAPPER constant can also be used as a device identifier. Only cbwoc bytes (or less) of information is copied to the location pointed to by pwoc. If cbwoc is zero, nothing is copied and the function returns zero.

See Also

WAVEOUTCAPS, waveOutGetNumDevs

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