[MSDN Library June 1998] IUnknown Macro (92.8571428571429%)

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 Interface (60.7460317460317%)

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 Interface (35.875104427736%)

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

[MSDN Library June 1998] IUnknown (33.891369047619%)

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

[MSDN Library June 1998] IUnknown (33.6974789915966%)

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