Items is an indexed TResultRecord property that provides access to the collection of resource records created when the resolver parses the DNS query response. 

Items ensures that read access to the collection always returns a TResultRecord instance. Applications can examine TResultRecord.RecType for the returned item to determine if another TResultRecord descendant can be used to access additional properties and methods for the resource record. 

Use casting to return an object reference that allows access to any properties or method specific to the descendant class associated with the value in TResultRecord.RecType. 

Items is the default property for the TQueryResult collection.

TResultRecord TIdDNSResolver.QueryResult