dOPC Client Toolkit Help file
TdOPCEventServer.Filter Property
C++
__published: __property TdOPCEventFilters Filter;
C#
Visual Basic
Property Filter() As TdOPCEventFilters

Filter contains the TdOPCEventFilters used by the server.

procedure TForm1.bUpdateClick(Sender: TObject);
var
  Filter : TdOPCEventFilter;
begin
  Filter := dOPCEventServer1.Filter[0]; //get first Filter
  Filter.SeverityLow := 100; //only Events with Severity >= 100
  Filter.Refresh; //if you change any Filter properties, you must call Refresh
end;
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