(require 'hen)
(require 'scheme-complete)
(autoload 'hen-smart-complete "scheme-complete" nil t)
(eval-after-load 'hen
            '(progn (define-key scheme-mode-map "\t" 'scheme-complete-or-indent)))
(add-hook 'hen-mode-hook
          (lambda ()
              (setq eldoc-info-function 'hen-get-current-symbol-info)
                  (eldoc-mode)))