DOCUMENT:Q189199 08-JAN-2000 [mspress] TITLE :Inside Distributed COM Comments and Corrections PRODUCT :Microsoft Press PROD/VER:: OPER/SYS: KEYWORDS:kbdocerr ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - MSPRESS Inside Distributed COM ISBN 1-57231-849-X ------------------------------------------------------------------------------- SUMMARY ======= This article contains comments, corrections, and information about known errors relating to the Microsoft Press book Inside Distributed COM, ISBN 1-57231-849-X. The following topics are covered: - Page 52: Reflexive and Symmetric Used Incorrectly MORE INFORMATION ================ Page 52: Reflexive and Symmetric Used Incorrectly ------------------------------------------------- The terms "Reflexive" and "Symmetric" are used incorrectly to describe QueryInterface rules. The correct meaning of these terms is as follows: Reflexive: (A=A) Symmetric: (if A=B, then B=A) To correct the book, the terms should be swapped. Specifically, page 52 should be changed in the following ways: QueryInterface must be reflexive. If a client holds a pointer to an interface and queries for that same interface, the call must succeed. QueryInterface must be symmetric. If a client holding a pointer to one interface queries successfully for a second interface, the client must be able to call QueryInterface through the second pointer for the first interface. Swap Reflexive and Symmetric labels on Figure 2-4. Microsoft Press is committed to providing informative and accurate books. All comments and corrections listed above are ready for inclusion in future printings of this book. If you have a later printing of this book, it may already contain most or all of the above corrections. Additional query words: ms_press ====================================================================== Keywords : kbdocerr Technology : kbMSPressSearch Version : : ============================================================================= 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 2000.