Hook into TYPO3 form creation

问题

I'm looking for a hook to hook into the creation of a frontend form in TYPO3 (e.g. a contact form) which will allow me to pass the form structure to my extensions the moment a form is created (or edited).

I'm not so sure where to look, and I have asked before, but might have formulated my question unclear. Does anyone know if such a hook exists, or is available in the new formengine of TYPO3 8?

Or if you have a better solution I could use, I'm open for everything.

Thanks!

来源：https://stackoverflow.com/questions/42623523/hook-into-typo3-form-creation