I subclassed from WPF RadTreeView and created a TreeListView and TreeListViewItem. I have various controls inside the TreeListViewItem(RadTreeViewItem) that are not functioning properly when I need to interact with them through a mouse drag (ie. selecting text in TextBox, or moving the scrollbar on a combobox dropdown). The treeview appears to hijack the mouse drag event. Any ideas on how to fix this? I have attached a jpeg of the control and the problem areas.