[MSDN Library June 1998] IUnknown (55.5555555555556%)

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

[MSDN Library June 1998] IUnknown (44.0922619047619%)

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

[MSDN Library June 1998] IUnknown (38.1426263219741%)

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::AddRef (37.3076923076923%)

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

[MSDN Library June 1998] IUnknown::Release (36.5723981900452%)

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