If this doesn’t convince you that it is worthwhile to learn Blend and Behaviors…
- Open a new phone project in Blend and drag a shape onto the artboard (e.g., an ellipse).
- Click on Assets –> Behaviors and drag MouseDragElementBehavior onto your shape
- There is no step 3. Run the program.
Note that if you try this with a Button or other control it won’t work. But if you put that control inside a Border and then drag MouseDragElementBehavior onto the border, you can then drag the border.