Appendix Differences Between Versions 1.0 and 2.0 of the Pen Application Programming Interface

Version 2.0 of the Pen Application Programming Interface (API) provides more services pics/PENAPI00090001.gif and more avenues for innovation pics/PENAPI00090001.gif than did version 1.0. A skimming of Chapters 10 and 11, which identify functions and structures new to version 2.0, indicates the extent of the enhancements added to the API.

However, if you have used version 1.0 of the Pen API, also known as Microsoft Windows for Pen Computing, you will find more than additional functions and other services in this release. Programming philosophy has changed as well. Partic-ularly in the area of recognition, the Pen API now allows greater freedom and responsibility for the handling and interpretation of pen input.

This appendix identifies some of the most important changes and improvements to the Pen API since version 1.0. It would require a number of pages to itemize all the improvements incorporated into version 2.0, which are described throughout this book. The purpose of this appendix is to help the developer familiar with version 1.0 to quickly identify several important areas of version 2.0 that reflect significant change. You will find that version 2.0 of the Pen API opens up new possibilities for collected ink data other than simply passing it to a recognizer.

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