Chameleon's framework is designed to encapsulate the actual logging devices being used. This is done through the usage of the OnLog event on the Engine object. Applications can write to the log by invoking the WriteToLog method.

The following code fragment shows how you might choose to implement the Log event in the case of just displaying the log in a memo control. In a real world application, you would most likely use a log file.

procedure TServerForm.hl7EngineLog(Sender: TObject; Line: String);
begin
   memOutput.Lines.BeginUpdate;
   while(memOutput.Lines.Count > 1000) do
   begin
      memOutput.Lines.Delete(0);
   end;
   memOutput.Lines.EndUpdate;
   memOutput.Lines.Add(Line);
end;