[This is preliminary documentation and subject to change.]
Requirement (Designed for Microsoft® Windows® Logo)
Containers must implement the IDropTarget and/or IDropSource interfaces for drag-and-drop functionality. This means that the application can accept drops from any IDropSource or can drag into any IDropTarget, or both.
If you use the Windows 95 and Windows NT common controls, or the RichEdit control for your edit controls, your application already has support for drag-and-drop.
Development Tools are not required to provide drag-and-drop support within the tool's design environment.