[opencms-dev] How to create a backoffice module?

[Salvador Santander]

Hello, list. I need to build a backoffice module. I've read the
documentation, and I don't know where can I start. My question are:
- how can I create the link in administration panel or the icon to the
adminstration form of my module?
- Is there other documentation about backoffice modules creation?
- Could you suggest me the basics steps for guide me?

Thanks.