Containers will re-size if you use percent widths and heights.
the matter is that it seems funny setting the button height as percentage
i want flash player to scale my flex app exactly like zooming in and out.....
I really doubt you'll get that out of the box without some code of your own.
Listen for the resize event and do your logic.
There is one bad thing with this scalemode that I found out.
I have 2 flex apps, the second one is embbed in the first one,
When I use your method to scale the second one (child),
the first one (parent) follows the child to scale (up or down)
Perhaps this scalemode applies to all loaded swf?