public static extern void SetOnRspError(IntPtr instance, [MarshalAs(UnmanagedType.FunctionPtr)] OnRspError callback);
public static extern void RegOnRspError(IntPtr mgr, OnRspError callback);
public void RegOnRspError(OnRspError callback) { CTPQuoteAPI.RegOnRspError(_handle, callback); }
public static extern void RegOnRspError(OnRspError e);