大家看下这个音频ＡＰＩ函数waveInPrepareHeader的调用有什么问题
// 定义结构体TWaveHdr
  [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
  public struct TWaveHdr
  {

  public unsafe char* lpData;  
  public int dwBufferLength;
  public int dwBytesRecorded;
  public int dwUser;
  public int dwFlags;
  public int dwLoops;
  public int lpNext;
  public int reserved;
  }

  //预先调配音频输入缓冲区
  [DllImport("winmm.dll",EntryPoint="waveInPrepareHeader",CharSet=CharSet.Auto)]
  public static extern int waveInPrepareHeader(IntPtr hwi, ref TWaveHdr pwh, int cbwh);
   

　　　　//调用
  int err_ms = VideoClass.waveInPrepareHeader(phwi, ref thd, System.Runtime.InteropServices.Marshal.SizeOf(thd));


　　　帮忙看下有什么错吗？为什么老不成功？



------解决方案--------------------
把你所有的代码贴出来看看

------解决方案--------------------
做录音?
用vc封个dll在调用吧..