SetCurrentDirectory function (winbase.h)
Changes the current directory for the current process.
BOOL SetCurrentDirectory( [in] LPCTSTR lpPathName );
The path to the new current directory. This parameter may specify a relative path or a full path. In either case, the full path of the specified directory is calculated and stored as the current directory.
For more information, see File Names, Paths, and Namespaces.
By default, the name is limited to MAX_PATH characters. To extend this limit to 32,767 wide characters, prepend "\\?\" to the path. For more information, see Naming Files, Paths, and Namespaces.
Starting with Windows 10, Version 1607, you can opt-in to remove the MAX_PATH limitation without prepending "\\?\". See the "Maximum Path Length Limitation" section of Naming Files, Paths, and Namespaces for details.
The final character before the null character must be a backslash ('\'). If you do not specify the backslash, it will be added for you; therefore, specify MAX_PATH-2 characters for the path unless you include the trailing backslash, in which case, specify MAX_PATH-1 characters for the path.
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.
Each process has a single current directory made up of two parts:
- A disk designator that is either a drive letter followed by a colon, or a server name and share name (\\servername\sharename)
- A directory on the disk designator
The current directory is shared by all threads of the process: If one thread changes the current directory, it affects all threads in the process. Multithreaded applications and shared library code should avoid calling the SetCurrentDirectory function due to the risk of affecting relative path calculations being performed by other threads. Conversely, multithreaded applications and shared library code should avoid using relative paths so that they are unaffected by changes to the current directory performed by other threads.
Note that the current directory for a process is locked while the process is executing. This will prevent the directory from being deleted, moved, or renamed.
In Windows 8 and Windows Server 2012, this function is supported by the following technologies.
|Server Message Block (SMB) 3.0 protocol||Yes|
|SMB 3.0 Transparent Failover (TFO)||Yes|
|SMB 3.0 with Scale-out File Shares (SO)||Yes|
|Cluster Shared Volume File System (CsvFS)||Yes|
|Resilient File System (ReFS)||Yes|
For an example, see Changing the Current Directory.
|Minimum supported client||Windows XP [desktop apps | UWP apps]|
|Minimum supported server||Windows Server 2003 [desktop apps | UWP apps]|
|Header||winbase.h (include Windows.h)|