--- title: "Drag-and-Drop Functionality" ms.date: "03/30/2017" helpviewer_keywords: - "drag and drop [Windows Forms], Windows Forms" - "Windows Forms, drag and drop" ms.assetid: 65cd2c03-8782-474e-b958-cbe43eeb902c --- # Drag-and-Drop Functionality in Windows Forms Windows Forms includes a set of methods, events, and classes that implement drag-and-drop behavior. This topic provides an overview of the drag-and-drop support in Windows Forms. Also see [Drag-and-Drop Operations and Clipboard Support](./advanced/drag-and-drop-operations-and-clipboard-support.md). ## Performing Drag-and-Drop Operations To perform a drag-and-drop operation, use the method of the class. For more information about how a drag-and-drop operation is performed, see . To get the rectangle that the mouse pointer must be dragged over before a drag-and-drop operation begins, use the property of the class. ## Events Related to Drag-and-Drop Operations There are two categories of events in a drag and drop operation: events that occur on the current target of the drag-and-drop operation, and events that occur on the source of the drag and drop operation. ### Events on the Current Target The following table shows the events that occur on the current target of a drag-and-drop operation. |Mouse Event|Description| |-----------------|-----------------| ||This event occurs when an object is dragged into the control's bounds. The handler for this event receives an argument of type .| ||This event occurs when an object is dragged while the mouse pointer is within the control's bounds. The handler for this event receives an argument of type .| ||This event occurs when a drag-and-drop operation is completed. The handler for this event receives an argument of type .| ||This event occurs when an object is dragged out of the control's bounds. The handler for this event receives an argument of type .| The class provides the location of the mouse pointer, the current state of the mouse buttons and modifier keys of the keyboard, the data being dragged, and values that specify the operations allowed by the source of the drag event and the target drop effect for the operation. ### Events on the Source The following table shows the events that occur on the source of the drag-and-drop operation. |Mouse Event|Description| |-----------------|-----------------| ||This event occurs during a drag operation. It provides an opportunity to give a visual cue to the user that the drag-and-drop operation is occurring, such as changing the mouse pointer. The handler for this event receives an argument of type .| ||This event is raised during a drag-and-drop operation and enables the drag source to determine whether the drag-and-drop operation should be canceled. The handler for this event receives an argument of type .| The class provides the current state of the mouse buttons and modifier keys of the keyboard, a value specifying whether the ESC key was pressed, and a value that can be set to specify whether the drag-and-drop operation should continue. ## See also - [Mouse Input in a Windows Forms Application](mouse-input-in-a-windows-forms-application.md)