private static void CreateDirectoryUsingDll(DirectoryInfo dir)
    {
        // On some occasion, the DirectoryInfo.Create() function will 
        // throw an error due to a bug in the .Net Framework design. For
        // example, it may happen that the user has no permissions to
        // list entries in a lower level in the directory path, and the
        // Create() call will simply fail.
        // To workaround it, we use mkdir directly.

        System.Collections.ArrayList oDirsToCreate = new System.Collections.ArrayList();

        // Check the entire path structure to find directories that must be created.
        while (dir != null && !dir.Exists)
        {
            oDirsToCreate.Add(dir.FullName);
            dir = dir.Parent;
        }

        // "dir == null" means that the check arrives in the root and it doesn't exist too.
        if (dir == null)
            throw (new System.IO.DirectoryNotFoundException("Directory \"" + oDirsToCreate[oDirsToCreate.Count - 1] + "\" not found."));

        // Create all directories that must be created (from bottom to top).
        for (int i = oDirsToCreate.Count - 1; i >= 0; i--)
        {
            string sPath = (string)oDirsToCreate[i];
            int iReturn = _mkdir(sPath);

            if (iReturn != 0)
                  throw new ApplicationException("Error calling [msvcrt.dll]:_wmkdir(" + sPath + "), error code: " + iReturn);
        }
    }