Which are the init-param of the portlet-xml file I have to write to declare the help page and the edit page? Please, suggest me an example.
Many thanks and bye,
I don't know if these init-params exists at all. When you click the Help or Edit buttons (and they show only when you have declared EDIT and HELP support in your portlet deployment descriptor), doHelp() and doEdit() methods are invoked where you can decide what page is to display relevant content. It's well described in the portlet spec.