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Overview |
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Group |
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Quick Info
Windows NT
| Yes
| Win95
| Yes
| Win32s
| Yes
| Import Library
| kernel32.lib
| Header File
| winbase.h
| Unicode
| WinNT
| Platform Notes
| None
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SetFileAttributes
The SetFileAttributes function sets a file's attributes.
BOOL SetFileAttributes(
LPCTSTR lpFileName,
| // address of filename
| DWORD dwFileAttributes
| // address of attributes to set
| );
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Parameters
lpFileName
Points to a string that specifies the name of the file whose attributes are to
be set.
Windows 95: This string must not exceed MAX_PATH characters.
Windows NT: There is a default string size limit for paths of MAX_PATH characters. This
limit is related to how the SetFileAttributes function parses paths. An application can transcend this limit and send in
paths longer than MAX_PATH characters by calling the wide (W) version of SetFileAttributes and prepending "\\?\" to the path. The "\\?\" tells the function to turn off path parsing; it lets paths longer than
MAX_PATH be used with SetFileAttributesW. This also works with UNC names. The "\\?\" is ignored as part of the path. For example, "\\?\C:\myworld\private" is seen as "C:\myworld\private", and "\\?\UNC\bill_g_1\hotstuff\coolapps" is seen as "\\bill_g_1\hotstuff\coolapps".
dwFileAttributes
Specifies the file attributes to set for the file. This parameter can be a
combination of the following values. However, all other values override
FILE_ATTRIBUTE_NORMAL.
Value
| Meaning
| FILE_ATTRIBUTE_ARCHIVE
| The file is an archive file. Applications use this value 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 value is valid only if used alone.
| FILE_ATTRIBUTE_OFFLINE
| The data of the file is not immediately available. Indicates that the file
data has been physically moved to offline storage.
| 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.
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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
You cannot use the SetFileAttribute function to set a file's compression state. Setting FILE_ATTRIBUTE_COMPRESSED
in the dwFileAttributes parameter does nothing. Use the DeviceIoControl function and the FSCTL_SET_COMPRESSION operation to set a file's compression
state.
See Also
DeviceIoControl, FSCTL_SET_COMPRESSION, GetFileAttributes
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