auxGetDevCaps

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

MMRESULT auxGetDevCaps(
  UINT 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:
AUX_MAPPER
Auxiliary audio mapper. The function returns an error if no auxiliary audio mapper is installed.
lpCaps
Address of an AUXCAPS structure to be filled with information about the capabilities of the device.
cbCaps
Size, in bytes, of the AUXCAPS structure.

Return Values

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

Value Description
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.

QuickInfo

  Windows NT: Requires version 3.1 or later.
  Windows: Requires Windows 95 or later.
  Windows CE: Unsupported.
  Header: Declared in mmsystem.h.
  Import Library: Use winmm.lib.
  Unicode: Implemented as Unicode and ANSI versions on Windows NT.

See Also

Waveform Audio Overview, Waveform Functions, AUXCAPS, auxGetNumDevs