waveOutGetDevCaps function
The waveOutGetDevCaps function retrieves the capabilities of a given waveform-audio output device.
Syntax
MMRESULT waveOutGetDevCaps(
UINT_PTR 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
Pointer to a WAVEOUTCAPS structure to be filled with information about the capabilities of the device.cbwoc
Size, in bytes, of the WAVEOUTCAPS structure.
Return value
Returns MMSYSERR_NOERROR if successful or an error otherwise. Possible error values include the following.
| Return code | Description |
|---|---|
| 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.
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 |