Adds the specified HttpApplication.PreRequestHandlerExecute event to the collection of asynchronous HttpApplication.PreRequestHandlerExecute event handlers for the current request.
- bh
- The System.Web.BeginEventHandler that starts asynchronous processing of the HttpApplication.PreRequestHandlerExecute.
- eh
- The System.Web.EndEventHandler that ends asynchronous processing of the HttpApplication.PreRequestHandlerExecute.