Extending Explorer with Band Objects
Ever wonder how to build something that looks like the Google toolbar in .NET? The ever magical Code Project has an article on how to do just that.
Update: I may have been very thick, but I couldn't get the code as described in the article to work. I could get it to work however if I a) manually put the dependent DLLs, including ShDocVw.dll into the GAC myself and b) followed the instructions here to actually register the component with Explorer using muchos Registry twiddling. Just an FYI for those who fancied trying to get this to work this afternoon.