public WaveInBuffer(IntPtr waveInHandle, int size) { m_WaveIn = waveInHandle; m_HeaderHandle = GCHandle.Alloc(m_Header, GCHandleType.Pinned); m_Header.dwUser = (IntPtr)GCHandle.Alloc(this); m_HeaderData = new byte[size]; m_HeaderDataHandle = GCHandle.Alloc(m_HeaderData, GCHandleType.Pinned); m_Header.lpData = m_HeaderDataHandle.AddrOfPinnedObject(); m_Header.dwBufferLength = size; WaveInHelper.Try(WaveNative.waveInPrepareHeader(m_WaveIn, ref m_Header, Marshal.SizeOf(m_Header))); }