Getting data from a web page...

Hi all,

I need some tips / tricks... Maybe one of you has already done such a thing.

We have a transaction (home made) in which we'd like to add a feature to help user selecting data.

What we'd like to do is to launch a web page, on which user will select data (helped with pictures).

Do anyone of you know how to get data from the web page ?

How would you do such a system ?

Thanks in advance !!!