Allows informing a customized filter for alarms, as an expression. Please check Alarm Filter's CustomFilter property for more information about the available fields for use on this filter's expression. User-defined fields can also be used on a filter expression, by using the name defined on the Alarm Server.

Altogether, messages displayed on a Filter list always pass through these filters:

•Filter by type, defined in the FilterType property

•Filter by severity, defined in the ShowLowPriority, ShowMediumPriority, and ShowHighPriority properties

•Filter by area, defined in the AreaFilter and SimpleAreaFilter properties

•Filter by the CustomFilter property

•Filter by the alarm summary. which is equivalent to the expression "Enabled AND (ConditionActive OR (AckRequired AND NOT Acked))"

For usage examples of this property, please check E3Alarm's CustomFilter property. Default value of this property is an empty String.