How retrieve the selection with gtk?

[eldruida <druidamix gmail com>]

Hello, and sorry for my English.

In the tutorial,http://www.gtk.org/tutorial/x1852.html, there are two
examples for handle selections, but I will retrieve data of selection
when the selection is made. And i don't find any other examples.

Can anybody put a small example, I'm somewhat lost, xD.

Thanks.