I was surprised, too, when I first learned about it. I have seen it used in a framework - a version of CodeBook, I think it was.
Now, being apparently undocumented behaviour means that, in theory, this behaviour is not guaranteed to continue working in future versions.
>Cetin,
>
>I can not belive it. (No, No it's true, I can trace it on my comp)
>So it means the
backmost object is instantiated first and all following are drawn over it. What a solution!
>
>I guess I have learned enough for this day.
>
>Agnes
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)