This function queries a specified waveform device to determine its capabilities.
At a Glance
| Header file: | Mmsystem.h |
| Windows CE versions: | 2.0 and later |
Syntax
MMRESULT waveOutGetDevCaps(UINT uDeviceID,
LPWAVEOUTCAPS pwoc, UINT cbwoc);
Parameters
uDeviceID
Identifier of the waveform-audio output device. It can be either a device identifier or a Handle to 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 Values
One of the values described in the following table is returned.
| Value | Description |
| MMSYSERR_NOERROR | Success. |
| MMSYSERR_INVALHANDLE | Specified device handle is invalid. |
| 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.