What files are required to create an admin module from scratch?

Hi, I have been searching for step by step instruction on how to create zen cart admin module from scratch. But, so far no luck. One way I tried to do it is by taking a current working addon, renamed it, and for simplicity, I made the page under admin/includes blank and renamed the link name in the navigation pulldown list. But, nothing showed up in the pulldown list.

The module I tried to duplicate is for Monthly Sales report and the link name is under the Reports pulldownlist.

Are there any instructions on how to create an admin module?
Or any other hints are appreciated.

Thank you,

Please let me know if I am posting in the wrong forum or if my question is not clear.

The location of your post is fine.

The answer is ... not so simple. It depends on what your module is intended to do, how complex its UI is, and so on. Best to follow examples of built-in and addon functionality.

I got it, thank you for your suggestion.