This is the default value for the TIdHTTPServer.SessionState property.

Id_TId_HTTPServer_SessionState = False;

ID_Default_TIdAntiFreezeBase_Active is the default value for the TIdHTTPServer.SessionState property. This is used in the class definition and the constructor. This is done to prevent problems with Delphi's form streaming mechanism. Changing this value will change the default value for that property.