public static extern short GT_GetWatchVar(short cardNum, short index, out TWatchVar pVar, out TWatchVarInfo pVarInfo);
public static extern short GT_AddWatchVar(short cardNum, ref TWatchVar pVar);
public static extern short GT_GetMcVar(short cardNum, out TWatchVar pVar, out double pValue);
public static extern short GT_AddWatchVar(ref TWatchVar pVar);