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Sample Download : http://code.msdn.microsoft.com/CSWinFormDragAndDrop-640b7c7f 

Windows users fall into two general categories: those who prefer to use the keyboard and those who prefer to use the mouse. Programmers have been taught to look after the needs of keyboard users by providing access keys (the underlined letter in a command or menu) and shortcuts (such as a CTRL + letter combination), but the needs of mouse users have largely been ignored. Programmers tend to primarily be keyboard users, so the emphasis on keyboard-oriented features is understandable, but every programmer should consider providing mouse support as well.

One thing that mouse users expect is the ability to drag and drop. If you look at most major applications or at Windows itself, drag and drop is everywhere. For example, users are accustomed to dragging and dropping files in the Windows Explorer and to dragging and dropping text in Microsoft Word.

Despite these expectations, few programmers provide drag-and-drop capability in their applications, most likely because implementing drag and drop appears to be much more difficult than it actually is. This example demonstrates how to perform drag-and-drop operations in a Windows Forms Application.

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