BSP tabstrip without MVC model

Hy Folks, i'm facing a really old code of a bsp (without MVC model), i need to had a new tabstrip in witch i will have a form to edit a long text.

I have successuffuly create a page with login and handler the event on input processing with a form to edit the text.

i have already create a page fragment for the tabstrip, but how do i insert (and handle) the form in the fragment page?

Regards.