To use the CaretFactory on the radtextbox as suggested as workaround by a telerik developer ( http://www.telerik.com/forums/automationproperties-not-reqognized-by-narrator ) I needed to update my dll's to version 2015.2.728.45.
This update broke my drag drop support in the application. When I use a touch screen to drag drop nothing is happining, before the update everything whas fine, tried to get the version without the update and the drag drop is working again.
Any idea how to fix this functionality? good drag drop support is one of the main reasons we are using telerik.