How to create addin for IE 5.0

Hello,
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I really need how to create addin for IE. For example, I want to write a program that is an addin for IE, but can change the background of the toolbar, (like the program HotBar).

Please tell me what are the basics of creating this kind of program.

Thanks in advance!

I am not 100% sure about the info i'm about to give you, but that's the impression i had for a while.

IE does not have the COM as far as i know, so creating an Add-In for it, becomes a little more involved. I believe you can download the IE API documentation from MSDN which might help you to integerate an application into IE. Then you can just use that API to communicate with IE. Maybe we'll see COM in future versions of IE.

P.S. If this information is inaccurate (which it prolly is, since i never did an IE Add-In), then please let me know.