Thanks EREL for your quick answer
And excuse me for my bad english
The value of a language is also the time for have a good answer to a beginner problem
After your answer, i have try the sharedModule, and see with pleasure it possible to enter a relative path, and that works, it's cool
Because i always works on an external hard drive, and too much language not allow this
The only problem with your method against IncludeFile, it's when you want cut the source in several piece for better visibilitty
Not really shared code between projects, just manage the code for one project.
With IncludeFile it's possible, we can use all the .bas wanted, present in a folder, without shared it
I'm happy to see this option exist, because i have lost one day to search a method for move the event on several class
Thanks to Informatix, i have found this
https://www.b4x.com/android/forum/threads/include-files.34442/#post-201872
But one time more, it's not also cool than IncludeFile