create/find a framework for dimming the UI and highlighting a specific area

[marcelgoldstein]

This could be achived by using semi-transparent border on an adornerlayer over the whole window.
This should be made working on all WPF Views (UserControl class) and target elements (frameworkelement or uielement) to highlight.
There should be animations to get from one state to another:
a) "off => on" by slowly dimming
b) "moving the highlight area" by moving it slowly and using a animation that moves slower at the start and end but faster in the middle.
c) "on => off" by slowly removing the dim effect