On Tuesday, Apr 20, 2004, at 21:51 Canada/Eastern, Anand Keathley wrote: > [...] Can a G5 even use Classic? Yes. > Anyway, I believe the process of adding something (plug-in?) to an OS > 9 program so it can be used in OS X is called "carbonizing."[...] Not quite. Carbon is a procedural C environment, i.e., an application development environment based on the C programming language. "Carbonizing" means porting (i.e., re-writing, rather than starting from scratch) a "Classic" application (i.e., one written for Mac OS 9 or earlier) to the Mac OS X, so that it runs natively. "Carbonizing" involves considerably less effort than writing an application from scratch. > Where can one learn how to do this? E.g., <http://developer.apple.com/referencelibrary/GettingStarted/GS_Carbon/ index.html> <http://www.oreilly.com/catalog/learncarbon/> > I'm thinking specifically about apps "Outlook Express,"[...] Fuhgeddaboutit. First and foremost, OE is proprietary code belonging to a small company you might have heard about, called Microsoft. Modify it or use the code in any way, and you'll have ten packs of legal wolves howling for your blood -- with a cistern of piranhas lining up behind them. Second, "carbonizing" a major app like OE is a seriously non-trivial task. If you want to learn Carbon, that's not what you should start with. Third, free e-mail clients do exist. Mail.app is part of OS X; and if that's not good enough for you, try pine. f