[MSDN Library June 1998] IExtension Interface (80.5%)

MSDN Library Visual Studio 6.0 > Platform SDK > Internet/Intranet/Extranet Services > Siteserver > Search > Search Programmer's Guide > Interface Overview

[MSDN Library June 1998] IExtension Interface (24.2424242424242%)

MSDN Library Visual Studio 6.0 > Platform SDK > Internet/Intranet/Extranet Services > Siteserver > Search > Programmer's Reference > Interfaces > IExtension