C# 调用 C++ 回调函数

1 [UnmanagedFunctionPointerAttribute(CallingConvention.StdCall, CharSet = CharSet.Ansi)]
2 public delegate void RealCallback(int hRealHandle, int dwDataType, IntPtr buffer, uint dwSize, IntPtr lpVoid);

1 [DllImport(DvxSdkPath, EntryPoint = "DVR_StartRealPlay", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
2 public static extern int StartRealPlay(int hUserHandle, Delegate callback);

1 private RealCallback realCallBack = null;

1 private void RealCallbackFun(int hRealHandle, int dwDataType, IntPtr lpReal, uint dwSize, IntPtr lpVoid)
2 {
3
4 }

1 realCallBack = RealCallbackFun;

1 StartRealPlay(handle, realCallBack);