MFT_ENUM_DATA

The MFT_ENUM_DATA structure contains information defining the boundaries for and starting place of an enumeration of change journal records. The FSCTL_ENUM_USN_DATA operation for the DeviceIoControl function uses MFT_ENUM_DATA.

typedef struct {
  DWORDLONG StartFileReferenceNumber;
  USN LowUsn;
  USN HighUsn;
} MFT_ENUM_DATA, *PMFT_ENUM_DATA;

Members

StartFileReferenceNumber

Ordinal position within the files on the current volume at which the enumeration is to begin.

The first call to FSCTL_ENUM_USN_DATA during an enumeration must have the StartFileReferenceNumber member set to (DWORDLONG)0. Each call to FSCTL_ENUM_USN_DATA returns the starting point for the subsequent call as the first entry in the output buffer. Subsequent calls must be made with StartFileReferenceNumber set to this value. For more information, see FSCTL_ENUM_USN_DATA.

LowUsn

Lower boundary of the range of USN values used to filter which records are returned. Only records whose last change journal USN is between or equal to the LowUsn and HighUsn member values are returned.

HighUsn

Upper boundary of the range of USN values used to filter which files are returned.

Requirements

  Windows NT/2000: Requires Windows 2000.
  Windows 95/98: Unsupported.
  Header: Declared in Winioctl.h.

See Also

Device Input and Output Overview, Device Input and Output Structures, DeviceIoControl, FSCTL_ENUM_USN_DATA