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HttpApplication.System.Web.IHttpAsyncHandler.BeginProcessRequest Method

Initiates an asynchronous call to the HTTP event handler.

Namespace: System.Web
Assembly: System.Web (in system.web.dll)

IAsyncResult IHttpAsyncHandler.BeginProcessRequest (
	HttpContext context,
	AsyncCallback cb,
	Object extraData
Not applicable.



An HttpContext that provides references to intrinsic server objects used to service HTTP requests.


The AsyncCallback to call when the asynchronous method call is complete. If cb is a null reference (Nothing in Visual Basic), the delegate is not called.


Any extra data needed to process the request.

Return Value

An IAsyncResult that contains information about the status of the process.

Windows 98, Windows Server 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

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