[MSDN Library June 1998] Extension Interfaces (100%)

MSDN Library Visual Studio 6.0 > Platform SDK > Database and Messaging Services > Extending the Microsoft Exchange Client > Guide > About Client Extensions > Extension Contexts

[MSDN Library June 1998] Extension Ordering (70.6818181818182%)

MSDN Library Visual Studio 6.0 > Platform SDK > Database and Messaging Services > Extending the Microsoft Exchange Client > Guide > About Client Extensions > Registering Extensions

[MSDN Library June 1998] Extension DLLs (35.8600759144237%)

MSDN Library Visual Studio 6.0 > Visual C++ Documentation > Using Visual C++ > Visual C++ Programmer's Guide > Adding Program Functionality > Details > DLL Topics > Extension DLLs

[MSDN Library June 1998] Extension Handlers (28.1720430107527%)

MSDN Library Visual Studio 6.0 > Platform SDK > Windows Base Services > Certificate Server > Certificate Server Concepts > Certificate Server Architecture

[MSDN Library June 1998] Extension (27.6992753623188%)

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

[MSDN Library September 1992] Extension Switches (23.9717282261742%)

Product Documentation > C/C++ 7.0 > Environment and Tools > PART 1 The Programmer's WorkBench > Chapter 7 Programmer's WorkBench Reference > 7.6 PWB Switches