[Typo3-dev] Creating backend module with $TCA??

[Lannsjo]

Hi
I am doing a backend tool for inserting data into a database ( a typo3/mod
module) . And I want users to be able to upload an image/movie with the nice
element browser..

I assume that there must be a way to insert a box like this:
http://wiki.typo3.org/index.php/Backend_Programming#The_GROUP_type_.2F_file:
into my backend module. I have tried to read the t3lib_TCEmain Class
Reference but havent found a way to do it...

Should I configure a $TCA variable somewhere? How do I make the box visible
in my backendtool?
Maybe someone has done a backendtool with fields like this that I can look
at?

I havent found any documentation at all about this...
/Martin