An UpdateProgress Control in Modal Popup Style with Atlas
Introduction
Atlas (ASP.NET AJAX) has this cool UpdateProgress control which provides a visual indicator while one or more of the UpdatePanel controls are being updated. This UpdateProgress control is great, but in some cases, I want all other elements on the page be disabled when the UpdateProgress is shown. Basically, I want the UpdateProgress to act as something like a modal popup. That led me to build this ModalUpdateProgress control.