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waveinprepareheader (winmm)
 
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Summary
The waveInPrepareHeader function prepares a buffer for waveform-audio input.

C# Signature:

[DllImport("winmm.dll", SetLastError = true)]
public static extern MMRESULT waveInPrepareHeader(IntPtr hwi, ref WAVEHDR pwh, uint cbwh);

VB Signature:

<DllImport("winmm.dll")> _
Shared Function waveInPrepareHeader(<MarshalAs(UnmanagedType.I4)> ByVal hwi As Integer, ByVal pwh As IntPtr, ByVal cbwh As UInteger) As MMRESULT
End Function
<DllImport("winmm.dll")> _
Shared Function waveInPrepareHeader(<MarshalAs(UnmanagedType.I4)> ByVal hwi As Integer, ByRef pwh As WAVEHDR, ByVal cbwh As UInteger) As MMRESULT
End Function

User-Defined Types:

MMRESULT

WAVEHDR

Alternative Managed API:

Do you know one? Please contribute it!

Notes:

When recording waveform audio, usually buffers are allocated with unmanaged functions and kept in an IntPtr() array; for this reason the function is provided in two versions, one processing a WAVEHDR ByRef and the other working with an IntPtr.

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Documentation

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