// ntifs.h

typedef struct _FILE_REGION_OUTPUT {
  ULONG            Flags;
  ULONG            TotalRegionEntryCount;
  ULONG            RegionEntryCount;
  ULONG            Reserved;
  FILE_REGION_INFO Region[1];
} FILE_REGION_OUTPUT, *PFILE_REGION_OUTPUT;
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Windows Driver Kit DDI reference (ns-ntifs-file_region_output)

Description

FILE_REGION_OUTPUT is the output structure for FSCTL_QUERY_FILE_REGIONS.

Members

`Flags`

A 32-bit unsigned integer that indicates the flags for this operation. No flags are currently defined so this field should be set to zero and be ignored.

`TotalRegionEntryCount`

A 32-bit unsigned integer that indicates the total number of regions that could be returned.

`RegionEntryCount`

A 32-bit unsigned integer that indicates the number of regions that were actually returned and which are contained in this structure.

`Reserved`

Reserved; this field should be set to zero and ignored.

`Region[1]`

One or more FILE_REGION_INFO structures that contain information on the desired ranges based on the desired usage indicated by DesiredUsage.

FILE_REGION_OUTPUT - NtDoc