Defines a method that enables controls to obtain a callback script.
Assembly: System.Web (in System.Web.dll)
Classes that implement the interface provide controls with a script that will initiate a callback to the server. A callback differs from the more common postback in that the page processing for the callback recreates the page without changing state information held by the page. For more information on creating callbacks, see Implementing Client Callbacks Programmatically Without Postbacks in ASP.NET Web Pages.
Classes that implement the interface should also implement the ICallbackEventHandler interface to handle the events raised by controls.
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.