[MSDN Library June 1998] Optional Arguments (100%)

MSDN Library Visual Studio 6.0 > Microsoft Office Development > Office 97 Documentation > Excel > Microsoft Excel 97 Developer's Kit > Writing Great Add-Ins > Why Make an Add-In?

[MSDN Library June 1998] Optional Sessions (31.325487184121%)

MSDN Library Visual Studio 6.0 > Conference Papers > PDC 96 Conference Papers > Exploiting Distributed Services > Day 4 (Thursday, November 7)

[MSDN Library June 1998] Optional Tag Values (26.6741199403738%)

MSDN Library Visual Studio 6.0 > DDK Documentation > Windows 95 Device Driver Kit > Design and Implementation Guide > Image Color Matching and Printer Drivers in Windows 95 > Overview of ICC 3.0 Profile Tags Used by Windows 95

[MSDN Library June 1998] Optional Ease-of-Use Features (24.7330187601124%)

MSDN Library Visual Studio 6.0 > Specifications > Platforms > Windows Guidelines for Accessible Software Design > The Microsoft Windows Guidelines for Accessible Software Design > Summary of Recommendations

[MSDN Library June 1998] Optional Methods (23.9346835225318%)

MSDN Library Visual Studio 6.0 > Platform SDK > COM and ActiveX Object Services > COM > Appendixes > ActiveX Control and Control Container Guidelines > Containers