This is CreateOnDatachange, a member of class TdDefaultGroup.

DeadBand contains the default deadband for TdOPCGroup objects created by TdOPCGroups.Add.

IsActive contains the default active state for TdOPCGroup objects created by TdOPCGroups.Add.

LocaleId contains the default locale ID for TdOPCGroup objects created by TdOPCGroups.Add.

TimeBias contains the default time bias for TdOPCGroup objects created by TdOPCGroups.Add.

UpdateRate contains the default update rate (in milliseconds) for TdOPCGroup objects created by TdOPCGroups.Add.