Introduction to the OpenTools API
The OpenTools application programming interface contains the classes and interfaces you need to create your own OpenTools to extend JBuilder. There are no limits to what an OpenTool can do - it could register a new menu item, a new file type, a new viewer, or search the web for email and display its own user interface. OpenTools are written in Java and can do just about anything, although usually they take advantage of methods exposed as a part of JBuilder's OpenTools API to add features to the IDE.
To help you understand how to use the OpenTools API, be sure to read the concept documents in Developing OpenTools, starting with
OpenTools basics and JBuilder OpenTools introduction.