There are some settings mentioned in this google-groups thread:
; setting the PC keyboard's various keys to Super or Hyper
(setq w32-pass-lwindow-to-system nil
w32-pass-rwindow-to-system nil
w32-pass-apps-to-system nil
w32-lwindow-modifier 'super ;; Left Windows key
w32-rwindow-modifier 'super ;; Right Windows key
w32-apps-modifier 'hyper) ;; Menu key
Update: so, I actually tried the above code in my own Win32 emacs setup. Lo, it works! awkward demo follows:
(defun super-test ()
(interactive)
(message "Super"))
(defun hyper-test ()
(interactive)
(message "Hyper"))
(global-set-key [(super h)] 'super-test)
(global-set-key [(hyper h)] 'hyper-test)
Unless I've done something else funky, these work natively; I'm running GNU Emacs 23.0.60.1 (i386-mingw-nt5.1.2600) of 2008-08-19 on LENNART-69DE564 (patched)