[MSDN Library June 1998] IUnknown Interface (78.968253968254%)

MSDN Library Visual Studio 6.0 > Platform SDK > Graphics and Multimedia Services > DirectX Media SDK > DirectShow SDK > C/C++ Reference > DirectShow COM Interfaces

[MSDN Library June 1998] IUnknown Macro (61.1428571428571%)

MSDN Library Visual Studio 6.0 > Platform SDK > Graphics and Multimedia Services > DirectX Media SDK > DirectShow SDK > C/C++ Reference > Utility Functions

[MSDN Library June 1998] IUnknown (51.84375%)

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

[MSDN Library June 1998] IUnknown (50%)

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

[MSDN Library June 1998] IUnknown (48.0353995299648%)

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