collection property editor

[--== Alain ==--]

Hi,

I would like to re-create the same behavior as we can find on ListView
control property when you want to add a new column.

Basically, i need :
1. to create a published property which will allow user (by clicking on
it) to open a property form where user can add new column data.
2. this property should be a collection (to allow not only 1 column but
several).

i already have an idea about the point 1. I understood that i should
create a custom collection editor. However, i would like to know how i
can later on, have access to each item from collection.

is there a tutorial somewhere on internet about create a customer
collection editor ?

thanks a lot for help.

Al.