[MSDN Library April 2000] IUnknown (79.6875%)

MSDN Library - April 2000 > Platform SDK > Component Services > COM > COM Fundamentals > Reference > Interfaces

[MSDN Library April 2000] IUnknown (63.2352941176471%)

MSDN Library - April 2000 > Platform SDK > Graphics and Multimedia Services > DirectX > DirectX Media SDK > DirectAnimation > Glossary > DirectShow > Glossary > DirectX Transform > C++/COM Reference > Interfaces

[MSDN Library April 2000] IUnknown (55.5555555555556%)

MSDN Library - April 2000 > Windows CE Documentation > Application Development > API Reference > Core > Interfaces

[MSDN Library April 2000] IUnknown (50%)

MSDN Library - April 2000 > Platform SDK > Graphics and Multimedia Services > DirectX > DirectX Media SDK > DirectAnimation > Glossary > DirectShow > C/C++ Reference > DirectShow COM Interfaces

[MSDN Library April 2000] IUnknown (49.5436507936508%)

MSDN Library - April 2000 > Platform SDK > Graphics and Multimedia Services > Windows Multimedia > Multimedia Reference > Multimedia Interfaces