Eclipse IDE : Adding external commands to the menu bar or toolbar?

I have some help files that I would like to integrate on the Elcipse toolbar or 开发者_StackOverflow社区menu bar. Is there any way to add commands to launch local files this way?

What you need to do is add a custom command to your toolbar.

I think you could use this tutorial, since it describes the general approach to commands in Eclipse:

http://www.vogella.de/articles/EclipseCommands/article.html