public static extern void SetOnRtnDepthMarketData(IntPtr instance, [MarshalAs(UnmanagedType.FunctionPtr)] OnRtnDepthMarketData callback);
public static extern void RegOnRtnDepthMarketData(IntPtr mgr, OnRtnDepthMarketData callback);
public void RegOnRtnDepthMarketData(OnRtnDepthMarketData callback) { CTPQuoteAPI.RegOnRtnDepthMarketData(_handle, callback); }
public static extern void RegOnRtnDepthMarketData(OnRtnDepthMarketData e);