Hi. I've been looking for at the mail-list archive but I didn't find any question similar. I do know if this question have been already answered. I'm developing a tool which generates code from an specification. In this context, I've integrated sdiff tool inside so user can be able to merge changes that comes from automatic source code generation and his changes. But, sdiff is not ediff mode inside emacs ;) I'm trying to launch an ediff-session inside in an already opened emacs from my tool, but I don't know how. So how can I connect to an already started emacs and launch an ediff session from a program that doesn't run inside emacs ? Any help is appreciated!. Cheers. -- Francis Brosnan Blázquez Advanced Software Production Line, S.L.