I have made a custom panel which has attached properties for each childs position (Left, Top). When I drag a control from the toolbox onto my custom panel, it draws at 0,0 as these are the default values for the attached properties. If I try and move the control around the panel it just stays at 0,0 as moving in the designer does not update the properties. How do I get the designer to update these properties when a child is moved around the designer?
Any help would be appreciated.