C++中抓图回调函数 void (CALLBACK* DisplayCBFun)(long nPort,char * pBuf,long nSize,long nWidth,long nHeight,long nStamp,long nType,long nReceaved)); C#中定义为委托 public delegate void DisplayCBFun(int nPort, IntPtr pBuf, int nSize, int nWidth, int nHeight, int nS