## Pen for OS/2 Device Driver Reference

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### Modifying the Pen for OS/2 Device Objects

The Pen for OS/2 system extension device objects provide a generic set of functions for customizing device settings, such as, pen and finger pause rate, double-tap rate, button mappings, and backlight timeout. You can use the provided classes and create object instances of these classes in your install procedure, or you can modify the classes to further refine their behavior.

Subclassing is the process of modifying the behavior of an existing object class. This section provides information on how to subclass Pen for OS/2 device object classes to modify their behavior. For general information on SOM and Workplace Shell programming, refer to:

Workplace Shell Programming Guide
System Object Model Programming Guide
Workplace Shell Programming Reference
Pen for OS/2 Programming Guide and Reference