Find out how sharing works in UWP, and then drill down into the Share Contract with Share source and Share target. See a demo of drag-and-drop support for your Windows 10 apps with UI Element.
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Microsoft Virtual Academy (MVA) Course: A Developer's Guide to Windows 10 --- Video 22 | Sharing and Drag-and-Drop
(( 22 Videos in Total, in this series ))
http://www.microsoftvirtualacademy.com/training-courses/a-developers-guide-to-windows-10
Channel 9 Portal: https://channel9.msdn.com