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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 and more avenues for innovation 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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