public WaveOutBuffer(IntPtr waveOutHandle, int size) { m_WaveOut = waveOutHandle; 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; WaveOutHelper.Try(WaveOutBase.waveOutPrepareHeader(m_WaveOut, ref m_Header, Marshal.SizeOf(m_Header))); }