Hola! is like having “Growl™” for 4D. Hola! is a system for posting notifications to users within any 4D database. Notifications are a way for your applications to provide users with new information, without interfering with the current window or process that they are in. Hola! lets a background process say “hi” to a user without it having to come to the foreground. Hola! even lets other clients or servers say “hi” to a user without interfering with what they are working on.