How to get started with developing Internet Explorer extensions?

Question

Does anyone here have experience with/in developing IE extensions that can share their knowledge? This would include code samples, or links to good ones, or documentation on

Answer 1

Another cool approach would be to check out:

http://www.crossrider.org

It's a framework based on JS with jquery which lets you develop browsers extensions for IE, FF and Chrome using a single common JS code. Basically the framework does all the nasty work and you're left with writing your applications code.