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auxGetDevCaps function

The auxGetDevCaps function retrieves the capabilities of a given auxiliary output device.

Syntax


MMRESULT auxGetDevCaps(
   UINT_PTR  uDeviceID,
   LPAUXCAPS lpCaps,
   UINT      cbCaps
);

Parameters

uDeviceID

Identifier of the auxiliary output device to be queried. Specify a valid device identifier (see the following comments section), or use the following constant:

Value Meaning
AUX_MAPPERAuxiliary audio mapper. The function returns an error if no auxiliary audio mapper is installed.

 

lpCaps

Pointer to an AUXCAPS structure to be filled with information about the capabilities of the device.

cbCaps

Size, in bytes, of the AUXCAPS structure.

Return value

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

Return codeDescription
MMSYSERR_BADDEVICEID

Specified device identifier is out of range.

 

Remarks

The device identifier in uDeviceID varies from zero to one less than the number of devices present. AUX_MAPPER may also be used. Use the auxGetNumDevs function to determine the number of auxiliary output devices present in the system.

Requirements

Minimum supported client

Windows 2000 Professional [desktop apps only]

Minimum supported server

Windows 2000 Server [desktop apps only]

Header

Mmsystem.h (include Windows.h)

Library

Winmm.lib

DLL

Winmm.dll

Unicode and ANSI names

auxGetDevCapsW (Unicode) and auxGetDevCapsA (ANSI)

See also

Waveform Audio
Waveform Functions

 

 

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