copy
//0x1 bytes (sizeof)
struct _MI_SEGMENT_SIGNATURE_FLAGS
{
    union
    {
        struct
        {
            UCHAR ImageSigningLevel:4;                                      //0x0
            UCHAR ImageSigningType:3;                                       //0x0
            UCHAR Spare:1;                                                  //0x0
        };
        UCHAR EntireField;                                                  //0x0
    };
};