The image shows notification flow with idle or active clients. It shows a situation where a Forms client is idle, on the right side. Since Oracle Forms is driven by the HTTP protocol, which is a request/response protocol only, nothing can change on the client if the client is idle. An applet parameter MaxEventWait, expressed in milliseconds, governs how long the application should wait before checking for an event. The middle of image shows the server-side where Forms Services receives all the events without polling.