Perhaps the closest thing to a real oop in common use (thanks largely to NeXT/Apple) is Objective-C

here's a few pointers to explore it with if you've not had the, erm, pleasure.

Apple Developer General Document: developer.apple.com/document...ndex.html

General FAQ: www.faqs.org/faqs/comput...ctive-C/faq/

GNU Objective C Library (Guide): www.delorie.com/gnu/docs/l...ts_toc.html

Here's the meat, stolen from the first document referenced:

"Objective-C’s dynamism enables the construction of sophisticated development tools. An interface to the runtime system provides access to information about running applications, so it’s possible to develop tools that monitor, intervene, and reveal the underlying structure and activity of Objective-C applications."