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WIN32_STREAM_ID structure (winbase.h)

The WIN32_STREAM_ID structure contains stream data.

Syntax

typedef struct _WIN32_STREAM_ID {
 DWORD dwStreamId;
 DWORD dwStreamAttributes;
 LARGE_INTEGER Size;
 DWORD dwStreamNameSize;
 WCHAR cStreamName[ANYSIZE_ARRAY];
} WIN32_STREAM_ID, *LPWIN32_STREAM_ID;

Members

dwStreamId

Type of data. This member can be one of the following values.

Value Meaning
BACKUP_ALTERNATE_DATA
0x00000004
 Alternative data streams. This corresponds to the NTFS $DATA stream type on a named data stream.
BACKUP_DATA
0x00000001
 Standard data. This corresponds to the NTFS $DATA stream type on the default (unnamed) data stream.
BACKUP_EA_DATA
0x00000002
 Extended attribute data. This corresponds to the NTFS $EA stream type.
BACKUP_LINK
0x00000005
 Hard link information. This corresponds to the NTFS $FILE_NAME stream type.
BACKUP_OBJECT_ID
0x00000007
 Objects identifiers. This corresponds to the NTFS $OBJECT_ID stream type.
BACKUP_PROPERTY_DATA
0x00000006
 Property data.
BACKUP_REPARSE_DATA
0x00000008
 Reparse points. This corresponds to the NTFS $REPARSE_POINT stream type.
BACKUP_SECURITY_DATA
0x00000003
 Security descriptor data.
BACKUP_SPARSE_BLOCK
0x00000009
 Sparse file. This corresponds to the NTFS $DATA stream type for a sparse file.
BACKUP_TXFS_DATA
0x0000000A

Transactional NTFS (TxF) data stream. This corresponds to the NTFS $TXF_DATA stream type.

Windows Server 2003 and Windows XP:  This value is not supported.

dwStreamAttributes

Attributes of data to facilitate cross-operating system transfer. This member can be one or more of the following values.

Value Meaning
STREAM_MODIFIED_WHEN_READ
 Attribute set if the stream contains data that is modified when read. Allows the backup application to know that verification of data will fail.
STREAM_CONTAINS_SECURITY
 Stream contains security data (general attributes). Allows the stream to be ignored on cross-operations restore.

Size

Size of data, in bytes.

dwStreamNameSize

Length of the name of the alternative data stream, in bytes.

cStreamName[ANYSIZE_ARRAY]

Unicode string that specifies the name of the alternative data stream.

Requirements

Requirement Value
Minimum supported client Windows XP [desktop apps only]
Minimum supported server Windows Server 2003 [desktop apps only]
Header winbase.h (include Windows.h)

See also

BackupRead

BackupSeek

BackupWrite

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