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Sets the attributes for a file or directory.
To perform this operation as a transacted operation, use the SetFileAttributesTransacted function.
BOOL SetFileAttributes( LPCWSTR lpFileName, DWORD dwFileAttributes );
The name of the file whose attributes are to be set.
In the ANSI version of this function, the name is limited to MAX_PATH characters. To extend this limit to 32,767 wide characters, call the Unicode version of the function (SetFileAttributesW) and prepend "\?" to the path. For more information, see File Names, Paths, and Namespaces.
The file attributes to set for the file.
This parameter can be one or more values, combined using the bitwise-OR operator. However, all other values override FILE_ATTRIBUTE_NORMAL.
Not all attributes are supported by this function. For more information, see the Remarks section.
The following is a list of supported attribute values.
||A file or directory that is an archive file or directory. Applications typically use this attribute to mark files for backup or removal.|
||The file or directory is hidden. It is not included in an ordinary directory listing.|
||A file that does not have other attributes set. This attribute is valid only when used alone.|
||The file or directory is not to be indexed by the content indexing service.|
||The data of a file is not available immediately. This attribute indicates that the file data is physically moved to offline storage. This attribute is used by Remote Storage, which is the hierarchical storage management software. Applications should not arbitrarily change this attribute.|
||A file that is read-only. Applications can read the file, but cannot write to it or delete it. This attribute is not honored on directories. For more information, see "You cannot view or change the Read-only or the System attributes of folders in Windows Server 2003, in Windows XP, or in Windows Vista.|
||A file or directory that the operating system uses a part of, or uses exclusively.|
||A file that is being used for temporary storage. File systems avoid writing data back to mass storage if sufficient cache memory is available, because typically, an application deletes a temporary file after the handle is closed. In that scenario, the system can entirely avoid writing the data. Otherwise, the data is written after the handle is closed.|
If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero. To get extended error information, call GetLastError.
The following table describes how to set the attributes that cannot be set using SetFileAttributes. For a complete list of all file attribute values and their descriptions, see File Attribute Constants.
|Attribute||How to Set|
|To set a file's compression state, use the DeviceIoControl function with the FSCTL_SET_COMPRESSIONoperation.|
|Reserved; do not use.|
|Files cannot be converted into directories. To create a directory, use the CreateDirectory orCreateDirectoryEx function.|
|To create an encrypted file, use the CreateFile function with the FILE_ATTRIBUTE_ENCRYPTED attribute. To convert an existing file into an encrypted file, use the EncryptFile function.|
|To associate a reparse point with a file or directory, use the DeviceIoControl function with theFSCTL_SET_REPARSE_POINT operation.|
|To set a file's sparse attribute, use the DeviceIoControl function with the FSCTL_SET_SPARSE operation.|
If a file is open for modification in a transaction, no other thread can open the file for modification until the transaction is committed. So if a transacted thread opens the file first, any subsequent threads that try modifying the file before the transaction is committed receives a sharing violation. If a non-transacted thread modifies the file before the transacted thread does, and the file is still open when the transaction attempts to open it, the transaction receives the error ERROR_TRANSACTIONAL_CONFLICT.