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

Declare Function auxGetDevCaps Lib "winmm.dll" Alias "auxGetDevCapsA" (ByVal uDeviceID As Long, lpCaps As AUXCAPS, ByVal uSize As Long) As Long

Operating Systems Supported
Requires Windows NT 3.1 or later; Requires Windows 95 or later


Parameter Information
- 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:
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: MMSYSERR_BADDEVICEID
Specified device identifier is out of range.

Last update: 07 April 2006