function cleans up the preparation performed by the waveOutPrepareHeader
function. This function must be called after the device driver is finished
with a data block. You must call this function before freeing the buffer.
| HWAVEOUT hwo,
| LPWAVEHDR pwh,
| UINT cbwh
Handle of the waveform-audio output device.
Address of a WAVEHDR
structure identifying the data block to be cleaned up.
Size, in bytes, of the WAVEHDR
Returns MMSYSERR_NOERROR if successful or an error otherwise. Possible error
values include the following:
||Specified device handle is invalid.
||No device driver is present.
||Unable to allocate or lock memory.
||The data block pointed to by the pwh parameter is still in the queue.
This function complements waveOutPrepareHeader
. You must call this function before freeing the buffer. After passing a
buffer to the device driver with the waveOutWrite
function, you must wait until the driver is finished with the buffer before
Unpreparing a buffer that has not been prepared has no effect, and the
function returns zero.
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