Developping an Apple Mail plugin - Language bindings

Hello,

I'm trying to create an addin for Mail.app, quite new to osX, and I really don't know where to begin.

Does anyone know how I could find some specs on the mail api? I'd like to develop a plugin that feeds a mail to a database before sending it.

On top of that I am still a bit unclear on languages bindings under osx.

From what I understand,

• ObjC - C/C++ can be used everywhere (as libraries and executables)
• Java - AppleScript be used to build executables, and use any other library, but you can't use them to build a library that will be called from C/C++ (without using JNI that is)

Am I utterly wrong there?

Thanks,
Palad1, recent 2K switcher who has a hard time getting rid of win32 coding habits...