This documentation is archived and is not being maintained.

Drag-and-Drop Sample

This sample has three examples of drag-and-drop functionality on a form in a Windows application.

To get samples and instructions for installing them

  • Do one or more of the following:

    • On the Help menu, click Samples.

      The Readme displays information about samples.

    • Visit the Visual Studio 2008 Samples Web site. The most recent versions of samples are available there.

    • Locate samples on the computer on which Visual Studio is installed. By default, samples and a Readme file are installed in drive:\Program Files\Microsoft Visual Studio 9.0\Samples\lcid. For Express editions of Visual Studio, all samples are located online.

For more information, see Visual Studio Samples.

Security noteSecurity Note:

This sample code is intended to illustrate a concept, and it shows only the code that is relevant to that concept. It may not meet the security requirements for a specific environment, and it should not be used exactly as shown. We recommend that you add security and error-handling code to make your projects more secure and robust. Microsoft provides this sample code "AS IS" with no warranties.

To run this sample

  • Press F5.

This sample has three examples of drag-and-drop.

  • TextBox   Demonstrates how to prevent a drop on a control. You can drag text from one TextBox control to two others, one of which does not have the AllowDrop property set to True.

  • TreeView   Demonstrates how to move nodes from one TreeView control to another.

  • PictureBox   Demonstrates how to copy images. You can drag images from one PictureBox to another. The AllowDrop property does not appear in the Properties window, and so is set to True in the code.

The data to be dragged should be an instance of the String, Bitmap, or MetaFile class, or an object that implements the ISerializable or IDataObject interface.