public static void MDCreate()
{
onquote = new lpRtn(OnQuote);
onhistquote = new lpRtnEx(OnInstrument);
oninstrument = new lpRtnEx(OnInstrument);
CreateFtdcMdApi();
SetMarketApiCallback(IntPtr.Zero, null, null, null, null, null, null, onquote, null, null, onhistquote, oninstrument);
}
public extern static void SetMarketApiCallback(IntPtr AContex, lpNoParam AOnFrontConnected, lpIntParam AOnFrontDisconnected, lpIntParam AOnHeartBeatWarning, lpRspError AOnRspError, lpRsp AOnRspUserLogin, lpRsp AOnRspUserLogout, lpRtn AOnRtnDepthMarketData, lpRsp AOnRspSubMarketData, lpRsp AOnRspUnSubMarketData, lpRtnEx AOnRspQryHistQuote, lpRtnEx AOnRspQryInstrument);