Used only for its IUnknown functionality. It has no methods of its own.
The IDefViewFrame interface has these methods.
Note This interface is supported through Windows XP Service Pack 3 (SP3) and Windows Server 2003. It is not supported in Windows Vista and later versions of Windows.
HRESULT hr = isp->QueryService(punkSite, SID_DefView, IID_IDefViewFrame, (void**)&pdvf);
|Minimum supported client||Windows 2000 Professional [desktop apps only]|
|Minimum supported server||Windows 2000 Server [desktop apps only]|