17 hours ago, Nickz said:
Thanks for your help, I’ll dig into that, as I quickly saw, it doesn’t seems to fully answer my question but I can be wrong.
If I find my way thanks to this I’ll surely share this
EDIT : I've been looking further, and it doesn't help me about what I'm searching for.
Maybe I was missing some specifications, I just need to generate a textarea that will work with tinyMCE, and I want it to be display in the hook displayAdminProductsMainStepLeftColumnMiddle, so I don't need to generate a form but just a field, that will be called in this hook.
What is done in this module is in order to generate textarea in configuration page of a Module, not in a hook, so this is not the same thing.
But thanks for your help.
If somebody have others purposes, I'll look