auxGetDevCapsW function (mmeapi.h)
The auxGetDevCaps function retrieves the capabilities of a given auxiliary output device.
Syntax
MMRESULT auxGetDevCapsW(
UINT_PTR uDeviceID,
LPAUXCAPSW pac,
UINT cbac
);
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_MAPPER | Auxiliary audio mapper. The function returns an error if no auxiliary audio mapper is installed. |
pac
Pointer to an AUXCAPS structure to be filled with information about the capabilities of the device.
cbac
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 code | Description |
|---|---|
|
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.
Note
The mmeapi.h header defines auxGetDevCaps as an alias that automatically selects the ANSI or Unicode version of this function based on the definition of the UNICODE preprocessor constant. Mixing usage of the encoding-neutral alias with code that is not encoding-neutral can lead to mismatches that result in compilation or runtime errors. For more information, see Conventions for Function Prototypes.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 2000 Professional [desktop apps only] |
| Minimum supported server | Windows 2000 Server [desktop apps only] |
| Target Platform | Windows |
| Header | mmeapi.h (include Windows.h) |
| Library | Winmm.lib |
| DLL | Winmm.dll |