waveInPrepareHeader
The waveInPrepareHeader function prepares a buffer for waveform-audio input.
MMRESULT waveInPrepareHeader(
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 to be prepared.
cbwh
Size, in bytes, of the WAVEHDR structure.
Return Values
Returns MMSYSERR_NOERROR if successful or an error otherwise. Possible error values include the following.
| Value | Description |
| MMSYSERR_INVALHANDLE | Specified device handle is invalid. |
| MMSYSERR_NODRIVER | No device driver is present. |
| MMSYSERR_NOMEM | Unable to allocate or lock memory. |
Remarks
The lpData, dwBufferLength, and dwFlags members of the WAVEHDR structure must be set before calling this function (dwFlags must be zero).
Requirements
** Windows NT/2000/XP:** Included in Windows NT 3.1 and later.
** Windows 95/98/Me:** Included in Windows 95 and later.
** Header:** Declared in Mmsystem.h; include Windows.h.
** Library:** Use Winmm.lib.
See Also