waveInUnprepareHeader.md

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Function name : waveInUnprepareHeader

Group: Windows Multimedia - Library: winmm

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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.

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Code examples:

Class for sound recording

Declaration:

MMRESULT waveInUnprepareHeader(
  HWAVEIN hwi,
  LPWAVEHDR pwh,
  UINT cbwh
);  

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FoxPro declaration:

DECLARE INTEGER waveInUnprepareHeader IN winmm;
	INTEGER hwi,;
	INTEGER pwh,;
	LONG    cbwh
  

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Parameters:

hwi Handle to the waveform-audio input device.

pwh Pointer to a WAVEHDR structure identifying the buffer to be cleaned up.

cbwh Size, in bytes, of the WAVEHDR structure.

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Return value:

Returns MMSYSERR_NOERROR (0) if successful or an error otherwise.

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