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RAD Studio VCL Reference
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TAggregate.InUse Property
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RAD Studio VCL Reference
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Indicates whether the aggregate value is currently available.
property InUse: Boolean;
__property Boolean InUse;
Read InUse to determine whether the Value method returns a summarized value. When InUse is false, Value returns Null. When InUse is true, the aggregate is maintained so that it calculates the formula specified by Expression for the current set of records, including any edits to records in the current group.
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Description