GUIlib used in ALE?

Anyone knows which GUI library they use in ALE (Advanced Landscape Editor) as it looks quite sweet :)

I think its Xlnt ii.
http://www.blitzbasic.com/toolbox/toolbox.php?tool=72

The GUI I would like to have my hands on is the Gile[s] one.

Hmm yeah. It does look like XLnt II. The Gile[s] on is very sweet. Almost fooled me into thinking it was a native c++ windows app. Maybe it is? ;)

I'm thinking Windows' GUI, but it actually looks rather custom, come to think of it.