IDropTarget interface

The IDropTarget interface is one of the interfaces you implement to provide drag-and-drop operations in your application. It contains methods used in any application that can be a target for data during a drag-and-drop operation. A drop-target application is responsible for:

  • Determining the effect of the drop on the target application.
  • Incorporating any valid dropped data when the drop occurs.
  • Communicating target feedback to the source so the source application can provide appropriate visual feedback such as setting the cursor.
  • Implementing drag scrolling.
  • Registering and revoking its application windows as drop targets.
The IDropTarget interface contains methods that handle all these responsibilities except registering and revoking the application window as a drop target, for which you must call the RegisterDragDrop and the RevokeDragDrop functions.

Methods

The IDropTarget interface has these methods.

Method Description
IDropTarget::DragEnter Indicates whether a drop can be accepted, and, if so, the effect of the drop.
IDropTarget::DragLeave Removes target feedback and releases the data object.
IDropTarget::DragOver Provides target feedback to the user and communicates the drop's effect to the DoDragDrop function so it can communicate the effect of the drop back to the source.
IDropTarget::Drop Incorporates the source data into the target window, removes target feedback, and releases the data object.

Requirements

   
Minimum supported client Windows 2000 Professional [desktop apps only]
Minimum supported server Windows 2000 Server [desktop apps only]
Target Platform Windows
Header oleidl.h

See Also

DoDragDrop

IDropSource

IDropSourceNotify

RegisterDragDrop

RevokeDragDrop