Customizing SharePoint Context Menus (thx to Mark Bower)
Drop-down menus in Windows SharePoint Services and SharePoint Portal Server 2003 enable actions that relate to a specific document in a document library to be viewed and invoked. This article shows how these document context menus can be extended to add custom menu items. The document first explains how SharePoint document library context menus work, and then demonstrates how custom menu items can be added.