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Provides the communication mechanism between a window and the OLE libraries.
Creating an object of this class allows a window to accept data through the OLE drag-and-drop mechanism.
To get a window to accept drop commands, you should first create an object of the COleDropTarget class, and then call the Register function with a pointer to the desired CWnd object as the only parameter.
For more information on drag-and-drop operations using OLE, see the article Drag and Drop (OLE).