PreventDefault() on softKeyboardActivating event does not block the keyboard

Related to FLEX-34141, when the softKeyboardActivating is fired, I try to not open the keyboard.

For that, try the project.
I try to do what is written here http://help.adobe.com/en_US/as3/dev/WSfffb011ac560372f6bc38fcc12e0166e73b-8000.html

" If you call the preventDefault() method of the dispatched event object, the virtual keyboard does not open."