(if (load "folding")
    (progn (add-hook 'folding-mode-hook
                     (lambda ()
                       (local-set-key [C-tab] 'folding-toggle-show-hide)))
           (add-hook 'c-mode-hook
                     (lambda ()
                       (folding-mode)))
           (add-hook 'emacs-lisp-mode-hook
                     (lambda ()
                       (folding-mode)))))