[MSDN Library June 1998] Optional Methods in Control Interfaces (32.4013157894737%)

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

[MSDN Library June 1998] Optional Methods (26.6682330827068%)

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

[MSDN Library June 1998] Optional Graphics Driver Functions (26.4457614942529%)

MSDN Library Visual Studio 6.0 > DDK Documentation > Microsoft Windows NT 4.0 DDK > Graphics Drivers > Design Guide > Part 1: Graphics Drivers > Chapter 3 Supporting the DDI > Graphics Driver Function Support

[MSDN Library June 1998] Optional Display Driver Functions (26.2109333755675%)

MSDN Library Visual Studio 6.0 > DDK Documentation > Microsoft Windows NT 4.0 DDK > Graphics Drivers > Design Guide > Part 2: Display and Video Miniport Drivers > Chapter 5 DDI Support in Display Drivers > Display Driver DDI Functions

[MSDN Library June 1998] Optional Features of ACM Drivers (25.2964626099707%)

MSDN Library Visual Studio 6.0 > DDK Documentation > Windows 95 Device Driver Kit > Design and Implementation Guide > Audio Compression Manager Drivers > About the Audio Compression Manager