Define different visual states and transition times for a user
control When you create your own user control, you can add
custom states and state groups to define a different appearance
for each state of your user control. For example, if your user
control represents a playing card, you might want to have a
FaceUp and FaceDown state. In a Silverlight project, when you
modify the template of a system control, such as a button,
default state groups and states are already present. You cannot
add new state groups or add states. To define a state group for
your user control If you do not already have a user control, you
can create a new user control in your project, and open the XAML
file for editing. For more information, see Create a new user
control in your project. You can also define state groups for
your main document (typically Page.xaml). The States panel shows
the default appearance of the objects in your user control. You
can select Base whenever you want to exit state-recording mode,
such as when you wa