typedef struct _WHEA_ERROR_RECORD_SECTION_DESCRIPTOR
{
     ULONG SectionOffset;
     ULONG SectionLength;
     WORD Revision;
     UCHAR ValidationBits;
     UCHAR Reserved;
     ULONG Flags;
     GUID SectionType;
     GUID FRUId;
     WHEA_ERROR_SEVERITY SectionSeverity;
     CHAR FRUText[20];
} WHEA_ERROR_RECORD_SECTION_DESCRIPTOR, *PWHEA_ERROR_RECORD_SECTION_DESCRIPTOR;

Windows Vista Kernel Structures