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SetFileAttributes
The SetFileAttributes function sets a file's attributes.

BOOL SetFileAttributes(
LPCTSTR lpFileName, // file name
DWORD dwFileAttributes // attributes
);
Parameters
lpFileName
[in] Pointer to a string that specifies the name of the file whose attributes are to be set.
Windows NT/2000: In the ANSI version of this function, the name is limited to MAX_PATH characters. To extend this limit to nearly 32,000 wide characters, call the Unicode version of the function and prepend "\\?\" to the path. For more information, see File Name Conventions.

Windows 95/98: This string must not exceed MAX_PATH characters.

dwFileAttributes
[in] Specifies the file attributes to set for the file. This parameter can be one or more of the following values. However, all other values override

FILE_ATTRIBUTE_NORMAL. Attribute Meaning
FILE_ATTRIBUTE_ARCHIVE The file is an archive file. Applications use this attribute to mark files for backup or removal.
FILE_ATTRIBUTE_HIDDEN The file is hidden. It is not included in an ordinary directory listing.
FILE_ATTRIBUTE_NORMAL The file has no other attributes set. This attribute is valid only if used alone.
FILE_ATTRIBUTE_NOT_CONTENT_INDEXED The file will not be indexed by the content indexing service.
FILE_ATTRIBUTE_OFFLINE The data of the file is not immediately available. This attribute indicates that the file data has been physically moved to offline storage. This attribute is used by Remote Storage, the hierarchical storage management software in Windows 2000. Applications should not arbitrarily change this attribute.
FILE_ATTRIBUTE_READONLY The file is read-only. Applications can read the file but cannot write to it or delete it.
FILE_ATTRIBUTE_SYSTEM The file is part of the operating system or is used exclusively by it.
FILE_ATTRIBUTE_TEMPORARY The file is being used for temporary storage. File systems attempt to keep all of the data in memory for quicker access rather than flushing the data back to mass storage. A temporary file should be deleted by the application as soon as it is no longer needed.


Return Values
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.

Remarks
The following table describes how to set the attributes that cannot be set using SetFileAttributes.

Attribute How to Set
FILE_ATTRIBUTE_COMPRESSED To set a file's compression state, use the DeviceIoControl function with the FSCTL_SET_COMPRESSION operation.
FILE_ATTRIBUTE_DEVICE Reserved; do not use.
FILE_ATTRIBUTE_DIRECTORY Files cannot be converted into directories. To create a directory, use the CreateDirectory or CreateDirectoryEx function.
FILE_ATTRIBUTE_ENCRYPTED 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.
FILE_ATTRIBUTE_REPARSE_POINT To associate a reparse point with a file, use the DeviceIoControl function with the FSCTL_SET_REPARSE_POINT operation.
FILE_ATTRIBUTE_SPARSE_FILE To set a file's sparse attribute, use the DeviceIoControl function with the FSCTL_SET_SPARSE operation.


Requirements
Windows NT/2000: Requires Windows NT 3.1 or later.
Windows 95/98: Requires Windows 95 or later.
Header: Declared in Winbase.h; include Windows.h.
Library: Use Kernel32.lib.
Unicode: Implemented as Unicode and ANSI versions on Windows NT/2000.

See Also
File I/O Overview, File I/O Functions, GetFileAttributes

Built on Friday, May 12, 2000Requirements
Windows NT/2000: Requires Windows NT 3.1 or later.
Windows 95/98: Requires Windows 95 or later.
Header: Declared in Winbase.h; include Windows.h.
Library: Use Kernel32.lib.
Unicode: Implemented as Unicode and ANSI versions on Windows NT/2000.
See Also
File I/O Overview, File I/O Functions, GetFileAttributes