Hrvoje Niksic <hniksic(a)srce.hr&gt; writes: Yes. However I am beginning to like the substitute-key-definition solution more and more, because that expresses what we want. We really want to replace toggle-read-only (in interactive use) by some thing that calls a vc specific function sometimes. i.e. we use it instead of introducing some hooks in 'toggle-read-only-command'. That is plain silly. In XEmacs local behaviour always overrides global behaviour. (global-set-key [(control c) (control c)] ...) is never going to work always. Jan