This is the sample corresponding to the UserControl tutorial.
No modern presentation framework would be complete without the ability to create your own reusable controls. If no existing control has a programmatic interface that naturally represents your concept, go ahead and create a user control or custom control.
UserControls can be seen as a composition of existing controls. They contain a logical tree defining its look and tend to have logic that directly interacts with these child elements.
In contrast CustomControls are needed when you want to create a totally new control or extend the functionality of an existing control. A custom control tends to get its look from a visual tree defined in a separate control template and generally has logic that works even if the user changes its visual tree completely.
In this tutorial we will focus on the development of a simple user control that implements the typical numeric spinner.