The IHTMLPerformanceTiming::domainLookupEnd property must return the time immediately after the user agent finishes the domain name lookup for the current document. If a persistent connection is used or the current document is retrieved from relevant application caches or local resources, this property must return the same value as IHTMLPerformanceTiming::fetchStart.
HRESULT value = object.get_domainLookupEnd(ULONGLONG* p);
An ULONGLONG value that represents the time immediately after the user agent finishes the domain name lookup for the current document.
- Navigation Timing, Section 4.2
If a page is retrieved from an application cache, IHTMLPerformanceTiming::domainLookupEnd will have the same value as IHTMLPerformanceTiming::fetchStart.
The value reported by the IHTMLPerformanceTiming::domainLookupEnd property represents the number of milliseconds between the recorded time and midnight January 1, 1970 (UTC).
Windows Internet Explorer 9. This property is supported only for documents displayed in IE9 Standards mode. For more information, see Defining Document Compatibility.