Hi C Bates,
The arrow cue can be a simple ContentControl and in this case you will need:
TargetType = "ContentCotnrol"
The DragDrop manager actually generates and instance of the DragArrow class, but it is nothing more than a placeholder class:
public class DragArrow : ContentControl
If you wish to inherit it, then you will need to specify the namespace of the cotnrol which is:
Then the TargetType will be:
Thanks you for bringing our attention to this, it seems we have not mentioned this in the article.
the Telerik team