[MSDN Library April 2000] IExtension (80.5%)

MSDN Library - April 2000 > Platform SDK > Web Services > Site Server SDK > Search > Programmer's Guide > Interface Overview

[MSDN Library April 2000] IExtension Interface (36.5757575757576%)

MSDN Library - April 2000 > Platform SDK > Web Services > Site Server SDK > Search > Programmer's Reference > Interfaces > IExtension