To Read about wpf

http://msdn.microsoft.com/en-us/library/ms742806.aspx
http://msdn.microsoft.com/en-us/library/ms747183.aspx
http://msdn.microsoft.com/en-us/library/system.windows.routedeventargs.aspx
http://msdn.microsoft.com/en-us/library/ms742550.aspx
http://msdn.microsoft.com/en-us/library/ms752059.aspx
http://msdn.microsoft.com/en-us/library/system.windows.eventsetter.aspx
http://msdn.microsoft.com/en-us/library/system.windows.eventtrigger.aspx