This is the default value for the TIdIcmpClient.ReceiveTimeout property.

Id_TIDICMP_ReceiveTimeout = 5000;

Id_TIDICMP_ReceiveTimeout is the default value for the TIdIcmpClient.ReceiveTimeout 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.