struct NxCategoryField {
    const char*   FieldName;
    const char*   FieldInfo;
    unsigned char Set;
    unsigned char FieldType;
    unsigned char alignment[6];

    union { // field is ONE of the following depending on 'FieldType' member.
        __int64         i64Bit;          // FieldType == NxCFT_64BIT      (1)
        int             i32Bit;          // FieldType == NxCFT_32BIT      (2)
        const char*     StringZ;         // FieldType == NxCFT_STRINGZ    (3)
        double          Double;          // FieldType == NxCFT_DOUBLE     (4)
        NxPrice         nxPrice;         // FieldType == NxCFT_PRICE      (5)
        NxDate          nxDate;          // FieldType == NxCFT_DATE       (6)
        NxTime          nxTime;          // FieldType == NxCFT_TIME       (7)
        NxString*       pnxString;       // FieldType == NxCFT_NxSTRING   (8)
        StringTableItem stringTableItem; // FieldType == NxCFT_STRING_IDX (9) or NxCFT_STRING_MAP (10)
    } data;
};