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| waveInUnprepareHeader The waveInUnprepareHeader function cleans up the preparation performed by the waveInPrepareHeader function. This function must be called after the device driver fills a buffer and returns it to the application. You must call this function before freeing the buffer. VB4-32,5,6
Declare Function waveInUnprepareHeader Lib "winmm.dll" Alias "waveInUnprepareHeader" (ByVal hWaveIn As Long, lpWaveInHdr As WAVEHDR, ByVal uSize As Long) As Long |
| Operating Systems Supported |
| Requires Windows NT 3.1 or later; Requires Windows 95 or later |
· hwi
Handle of the waveform-audio input device.
· pwh
Address of a WAVEHDR structure identifying the buffer to be cleaned up.
· cbwh
Size, in bytes, of the WAVEHDR structure. |
Returns MMSYSERR_NOERROR if successful or an error otherwise. Possible error values include the following.
MMSYSERR_INVALHANDLE Specified device handle is invalid.
MMSYSERR_NODRIVER No device driver is present.
MMSYSERR_NOMEM Unable to allocate or lock memory.
WAVERR_STILLPLAYING The buffer pointed to by the pwh parameter is still in the queue. |
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