БЮИ.Необходимо переименовать каталог. Команды в VFP такой нет.
Подскажите, как это сделать с помощью API
MSDN Help
MoveFile
The MoveFile function moves an existing file or a directory, including its children.

To specify how to move the file, use the MoveFileEx function.

BOOL MoveFile(
LPCTSTR lpExistingFileName, // file name
LPCTSTR lpNewFileName // new file name
);
Parameters
lpExistingFileName
[in] Pointer to a null-terminated string that names an existing file or directory.
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.

lpNewFileName
[in] Pointer to a null-terminated string that specifies the new name of a file or directory. The new name must not already exist. A new file may be on a different file system or drive. A new directory must be on the same drive.
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.

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 MoveFile function will move (rename) either a file or a directory (including its children) either in the same directory or across directories. The one caveat is that the MoveFile function will fail on directory moves when the destination is on a different volume.

Windows 2000: The MoveFile function coordinates its operation with the link tracking service, so link sources can be tracked as they are moved.

MAPI: For more information, see Syntax and Limitations for Win32 Functions Useful in MAPI Development.

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.


А еще можно сделать так:
-создать директорию с нужным именем (CreateDirectory)
- скопировать все содержимое из исходной директории (можно средствами Фокса)
- удалиь исходную директорию (RemoveDirectory)