Controls visible alarm areas on a Filter. If its value is not an empty String, it displays events whose Area names start with the indicated text. For example, if AreaFilter is equal to "Ana", it displays Area alarms such as "Analog.Production" or "Analysis", but not "Digital.Analysis" ou "Digital.Production". When the SimpleAreaFilter property is set to True, an Alarm Area also allows using wildcard characters for filtering and multiple Area filters, separated by colons. Please check Alarm Filter's AreaFilter property for more information about the allowed wildcard characters.

Default value of this property is an empty String, that is, no filtering by area. Please check also the CustomFilter, SimpleAreaFilter, ShowCriticalPriority, ShowHighPriority, ShowMediumPriority, and ShowLowPriority properties.