typedef union _MM_PAGE_ACCESS_INFO_FLAGS { struct { unsigned long FilePointerIndex : 9; unsigned long HardFault : 1; unsigned long Image : 1; unsigned long Spare0 : 1; } File; struct { unsigned long FilePointerIndex : 9; unsigned long HardFault : 1; unsigned long Spare1 : 2; } Private; } MM_PAGE_ACCESS_INFO_FLAGS, *PMM_PAGE_ACCESS_INFO_FLAGS;