MessageDialog

A MessageDialog is a Dialog with two sections: a message and an action area 
with a button for dismissal. All MessageDialogs are modal (application or 
system). You must always dismiss a MessageDialog before continuing to interact 
with the rest of Sun MTPScan. A symbolic icon in the message section identifies 
the type of MessageDialog. The types of MessageDialogs are: ErrorDialog, 
InformationDialog, and WarningDialog.

When multiple MessageDialogs appear at the same time, you must dismiss them in
reverse order from which they appeared. In other words, dismiss the Dialog at
the top of the window stack until you have dismissed them all.

See also: Dialog, ErrorDialog, InformationDialog, WarningDialog
