.emacs visiting files

;; visit a file
(global-set-key (kbd "<f3>") 'find-file)

;; open my Emacs init file
(defun my-open-dot-emacs ()
  "Opening `~/.emacs'."
  (interactive)
  (find-file "~/.emacs"))
(global-set-key (kbd "<S-f3>") 'my-open-dot-emacs)

;; open my Gnus configuration file
(defun my-open-dot-gnus ()
  "Opening `~/.gnus'."
  (interactive)
  (find-file "~/.gnus"))
(global-set-key (kbd "<C-f3>") 'my-open-dot-gnus)