DOCUMENT:Q84191 16-DEC-1999 [win16ddk] TITLE :Proton.exe Uses DPMI Host for MS-DOS Protected Mode Apps PRODUCT :Microsoft Windows Device Driver Kit PROD/VER::3.0,3.1 OPER/SYS: KEYWORDS:kbfile kbsample ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows Device Development Kit (DDK) for Windows, versions 3.0, 3.1 ------------------------------------------------------------------------------- SUMMARY ======= A protected mode MS-DOS application can use the MS-DOS Protected Mode Interface (DPMI) to access the services provided by the enhanced mode of the Microsoft Windows graphical environment, versions 3.0 and 3.1. Proton.exe is a sample that demonstrates how to use DPMI. Proton.exe contains the source to an MS-DOS application that switches itself into protected mode, performs various protected mode tasks, and then terminates, returning back to real mode MS-DOS. The documentation for DPMI is available from Intel. In the United States, call (800) 548-4725. Outside the US, contact the appropriate Intel subsidiary or distributor. MORE INFORMATION ================ The following files are available for download from the Microsoft Download Center: Proton.exe (http://download.microsoft.com/download/winddk/sample1/3.1/W31/EN-US/Proton.exe) For additional information about how to download Microsoft Support files, click the article number below to view the article in the Microsoft Knowledge Base: Q119591 How to Obtain Microsoft Support Files from Online Services Microsoft used the most current virus detection software available on the date of posting to scan this file for viruses. Once posted, the file is housed on secure servers that prevent any unauthorized changes to the file. Additional query words: ====================================================================== Keywords : kbfile kbsample Technology : kbAudDeveloper kbWin3xSearch kbWinDDKSearch kbWinDDK300 kbWinDDK310 Version : :3.0,3.1 Issue type : kbinfo ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 1999.