public static extern Int32 IPCNET_StartRealData( Int32 lLoginID, ref tagRealDataInfo pRealDataInfo, CBRealData fRealData, IntPtr pUserData);
public static extern int IPCNET_StartRealData(int lLoginID, ref S_REALDATA_INFO pRealDataInfo, CBRealData fRealData, IntPtr pUserData);