- Browser Helper Object.
A BHO is a DLL that can attach itself to every new instance of Internet Explorer, allowing Internet Explorer events to be intercepted and providing access to the browser window and document object model. BHOs are also known as browser add-ins.
Additional toolbars are common examples of browser helper objects.
For more information see:
- www.15seconds.com/issue/040331.htm - Build a Managed BHO and Plug into the Browser. Short article
- http://msdn.microsoft.com/en-us/library/bb250436.aspx - Browser Helper Objects, an article from Microsoft.
- http://everything.explained.at/Browser_Helper_Object - BHO explained.