[MSDN Library June 1998] IUnknown (42.6309121621622%)

MSDN Library Visual Studio 6.0 > Platform SDK > Networking and Distributed Services > Telephony Application Programming Interface (TAPI) > TAPI Version 3.0 > Call and Media Controls > Call and Media Control Reference > Call and Media Control COM Interfaces

[MSDN Library June 1998] IUnknown (41.1574618096357%)

MSDN Library Visual Studio 6.0 > Platform SDK > COM and ActiveX Object Services > COM > Reference > Interfaces

[MSDN Library June 1998] IUnknown (38.3394263829046%)

MSDN Library Visual Studio 6.0 > Visual C++ Documentation > Reference > Microsoft Foundation Class Library and Templates > Active Template Library > Articles > Introduction to COM and ATL > Introduction to COM

[MSDN Library June 1998] IUnknown (37.3384253819036%)

MSDN Library Visual Studio 6.0 > Platform SDK > Graphics and Multimedia Services > Multimedia Reference > Multimedia Interfaces

[MSDN Library June 1998] IUnknown::AddRef (27.5163893870988%)

MSDN Library Visual Studio 6.0 > Platform SDK > Graphics and Multimedia Services > DirectX 5 > Introducing DirectX 5 > DirectX and the Component Object Model > IUnknown Interface