public class DASK
{
        public const int NoError              =0;
    public const int ErrorUnknownCardType         =-1;
    public const int ErrorInvalidCardNumber       =-2;
    public const int ErrorTooManyCardRegistered   =-3;
    public const int ErrorCardNotRegistered       =-4;
    public const int ErrorFuncNotSupport          =-5;
    public const int ErrorInvalidIoChannel        =-6;
    public const int ErrorInvalidAdRange          =-7;
    public const int ErrorContIoNotAllowed        =-8;
    public const int ErrorDiffRangeNotSupport     =-9;
    public const int ErrorLastChannelNotZero      =-10;
    public const int ErrorChannelNotDescending    =-11;
}