waveInAddBuffer function (Windows)

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waveInAddBuffer function

Applies to: desktop apps only

The waveInAddBuffer function sends an input buffer to the given waveform-audio input device. When the buffer is filled, the application is notified.

Syntax

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

Parameters

hwi: Handle to the waveform-audio input device.
pwh: Pointer to a WAVEHDR structure that identifies the buffer.
cbwh: Size, in bytes, of the WAVEHDR structure.

Return value

Returns MMSYSERR_NOERROR if successful or an error otherwise. Possible error values include the following.

Return code	Description
MMSYSERR_INVALHANDLE	Specified device handle is invalid.
MMSYSERR_NODRIVER	No device driver is present.
MMSYSERR_NOMEM	Unable to allocate or lock memory.
WAVERR_UNPREPARED	The buffer pointed to by the pwh parameter hasn't been prepared.

Remarks

When the buffer is filled, the WHDR_DONE bit is set in the dwFlags member of the WAVEHDR structure.

The buffer must be prepared with the waveInPrepareHeader function before it is passed to this function.

Requirements

Minimum supported client	Windows 2000 Professional
Minimum supported server	Windows 2000 Server
Header	Mmsystem.h (include Windows.h)
Library	Winmm.lib
DLL	Winmm.dll