[Typo3-dev] Extending a FCE form

[Robert John de Stigter]

Hi,
 
I got the following situation. 
 
Users within my typo3 backend can place articles on pages. The articles
are built up with a Flexible Content Element. That way they hand me the
content and I take care of how it is placed. My problem is that users
can't choose to place a listing or table in an article. Only plain text
with the 'Text area for bodytext' editing type.
 
What I did was enable the editing type to a rich text editor. But that
gave them to many possibilities causing me to loose control on the
output. I've also set the 'Text are for bodytext' to 'Content Elements'.
That way they could create content of other types and link them in the
article. But I find that to extensive.
 
What I would to do is an item added to 'Editing type' when you build up
the datastructure and handle the proccessing of it with some php code.
Is there a hook for this maby? 
I was able to add an item to the 'editing type' list in the file
'templavoila/cm1/index.php', but I couldn't find out where the input is
beeing processed (based on the selected editing type).
 
Or are there other (better) ways to work this out.
 
Regards,
RJ