Can anyone here teach me simple way on how I can go about developing a toolbar for both the IE and Firefox browsers? I want a user to able to type in something on the toolbar which will in turn input the text into my site's search box. Your help would be greatly appreciated.
I don't know about IE but in Firefox it's done by making an extension that makes use of XUL (based on XML), javascript, css and RDF. You can have a search at Mozilla.org for more info and here's a nice site about it: http://xulplanet.com/
go here Browser Toolbar Developing - you might get some useful info there! also you can Download Bookmark Toolbar now for free.
you can check http://www.codeproject.com/KB/custom-controls/CrossBrowserToolbar.aspx or http://www.codeproject.com/KB/dotnet/IE_toolbar.aspx?display=Print