Represents a method that will handle the SimpleAction.Execute event.
NuGet Package: DevExpress.ExpressApp
When creating a PopupWindowShowActionExecuteEventHandler delegate, you identify the method that will handle the corresponding event. To associate an event with your event handler, add a delegate instance to this event. The event handler is called whenever the event occurs unless you remove the delegate. For more information on event handler delegates, see Handling and Raising Events.