WPF Custom Controls (Actually User Controls) HD

How to make WPF User Controls. This video is titled as "Custom Controls" based on my personal struggles as a novice developer. I searched the internet using the term "custom control" when, in fact, I was looking for User Control examples. In my opinion the major difference between a User Control and a Custom Control is User Controls consist of a collection of existing controls, combined to make a new control. Whereas Custom Controls extend the functionality of existing controls. I hope this helps :)