struct MMSUBSECTION_FLAGS

typedef struct _MMSUBSECTION_FLAGS
{
     ULONG SubsectionAccessed: 1;
     ULONG Protection: 5;
     ULONG StartingSector4132: 10;
     ULONG SubsectionStatic: 1;
     ULONG GlobalMemory: 1;
     ULONG DirtyPages: 1;
     ULONG Spare: 1;
     ULONG SectorEndOffset: 12;
} MMSUBSECTION_FLAGS, *PMMSUBSECTION_FLAGS;

Windows Vista Kernel Structures