I've just become aware that there's a new article on MSDN that provides a step-by-step guide on building a Browser Helper Object for Internet Explorer. Since I know first hand how hard developing IE extensions can be (although Find As You Type is primarily a toolbar, it also uses a BHO to capture the CTRL-F keypress) it's good to see that MS is at least improving the documentation that is out there.
The article uses ATL, which I personally didn't use. Not that I have anything against ATL; it's just that I'm familiar with COM and prefer to have the least amount of auto-generated code possible. But if you're a fresh C++ programmer who's perhaps transitioning from the .Net world who wants to try his/her hands at developing an IE extension, ATL is an excellent way to hide all the tricky bits of doing COM.
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