I've just purchased the WPF components and am very impressed with the level of functionality having previously built a project using the straight Microsoft Components . One of the important requirements for our next project is the ability to drag and drop items from a ListBox to a Treeview. Each of these components are located in separate UserControls. I have been successful in drag and dropping within the same Treeview and from the Listbox to the GridView but cannot seem to get the ListBox to Treeview working. I am sure I am missing something basic or are there any limitations in dragging from a Listbox in one UserControl to a Treeview in another .Hope you can help