Skip to main content
Microsoft
The Old New Thing
The Old New Thing
  • Home
  • DevBlogs
    • Visual Studio
    • Visual Studio Code
    • Visual Studio for Mac
    • DevOps
    • Developer support
    • CSE Developer
    • Engineering@Microsoft
    • Azure SDK
    • IoT
    • Command Line
    • Perf and Diagnostics
    • Dr. International
    • Notification Hubs
    • Math in Office
    • DirectX
    • PIX
    • SurfaceDuo
    • Startups
    • Sustainable Engineering
    • Windows AI Platform
    • C++
    • C#
    • F#
    • Visual Basic
    • TypeScript
    • PowerShell Community
    • PowerShell Team
    • Python
    • Q#
    • JavaScript
    • Java
    • Java Blog in Chinese
    • .NET
    • .NET MAUI
    • Blazor
    • ASP.NET
    • NuGet
    • Xamarin
    • #ifdef Windows
    • Apps for Windows
    • Azure Depth Platform
    • Azure Government
    • Bing Dev Center
    • Microsoft Edge Dev
    • Microsoft Azure
    • Microsoft 365 Developer
    • Old New Thing
    • Windows MIDI and Music dev
    • Windows Search Platform
    • Azure Cosmos DB
    • Azure Data Studio
    • Azure SQL Database
    • OData
    • Revolutions R
    • SQL Server Data Tools

    The Old New Thing

    August 2012 - The Old New Thing

    Adventures in undefined behavior: The premature downcast
    Adventures in undefined behavior: The premature downcast
    August 31, 2012 Aug 31, 2012 08/31/12
    Raymond C
    A customer encountered the following problem: The Buy­Paint function converts the cookie back to a Shape object, and then checks if the object is a Shape2D object by calling Is­2D. If so, then it does some more stuff to figure out what type of paint to buy. (Note to nitpickers: The actual scenario was not like this, but I ...

    Comments are closed.0Code
    I'm not calling a virtual function from my constructor or destructor, but I'm still getting a __purecall error
    I'm not calling a virtual function from my constructor or destructor, but I'm still getting a __purecall error
    August 30, 2012 Aug 30, 2012 08/30/12
    Raymond C
    Some time ago, I described what __purecall is for: It's to detect the cases where you call a virtual method with no implementation (a so-called pure virtual method). This can happen during object constructor or destruction, since those are times when you can validly have a partially-implemented object. Well, there's another case this can ...

    Comments are closed.0Code
    Psychic debugging: Why Chinese characters don't work
    Psychic debugging: Why Chinese characters don't work
    August 29, 2012 Aug 29, 2012 08/29/12
    Raymond C
    Here's a walkthrough of an actual case of psychic debugging. I'm using the internal XYZ table-generating tool, but it appears to be useless in my case. Does this tool work? Right now, I'm just resorting to the manual method of generating my data table (Chinese and English). Hooray for vague questions! "It appears to be useless." But there ...

    Comments are closed.0Other
    Command line tool to manage Windows 7 Libraries, with source code
    Command line tool to manage Windows 7 Libraries, with source code
    August 28, 2012 Aug 28, 2012 08/28/12
    Raymond C
    A customer asked if there was a command-line tool for managing Windows 7 Libraries so that they could create and deploy libraries across their organization. Not only is there such a tool, it even comes with source code. The Shell Library Command Line Sample shows how to manage Windows 7 libraries programmatically via the IShell...

    Comments are closed.0CodeTips/Support
    Well at least nobody's parking there any more
    Well at least nobody's parking there any more
    August 28, 2012 Aug 28, 2012 08/28/12
    Raymond C
    There is a field next to the Microsoft building I used to work in, and for a time, people parked their cars out on the field, presumably because finding a proper parking space in the garage became difficult due to overcrowding. To prevent people from parking in the field, Security placed a large log across the access to the field. The ...

    Comments are closed.0Non-Computer
    How does the taskbar decide whether to show Recent or Frequent documents on the jump list?
    How does the taskbar decide whether to show Recent or Frequent documents on the jump list?
    August 27, 2012 Aug 27, 2012 08/27/12
    Raymond C
    Some jump lists show Recent documents, and others show Frequent documents. (Images stolen from Sasha Goldshtein.) Our friend xpclient wanted to know how the taskbar decides which one to use, because it seemed random. (Ironically, xpclient is asking a question about the Window 7 client.) The default is to show Recent documents. But an...

    Comments are closed.0Tips/Support
    Dumping a hash table with external chaining from the debugger
    Dumping a hash table with external chaining from the debugger
    August 24, 2012 Aug 24, 2012 08/24/12
    Raymond C
    I was doing some crash dump debugging, as I am often called upon to do, and one of the data structure I had to grovel through was something that operated basically like an atom table, so that's what I'll call it. Like an atom table, it manages a collection of strings. You can add a string to the table (getting a unique value back, which we ...

    Comments are closed.0Other
    Wait, you never said that I had to initialize the object before I used it!
    Wait, you never said that I had to initialize the object before I used it!
    August 23, 2012 Aug 23, 2012 08/23/12
    Raymond C
    A customer reported that they were having trouble creating slim reader/writer locks at runtime. They simplified the issue to a short program: "What is the correct way of creating an SRWLOCK via the new operator?" It wasn't long before somebody noted that nowhere in the code is the function Initialize­SRW­Lock called. "Oh, yeah...

    Comments are closed.0Code
    The shifting sands of "Run as different user"
    The shifting sands of "Run as different user"
    August 22, 2012 Aug 22, 2012 08/22/12
    Raymond C
    A customer liaison asked the following question on behalf of his customer. When I do a shift-right-click on a shortcut to a program, I see the following: The option to run a program as another user (other than Administrator) was present in Windows XP, but it was lost in Windows Vista. It appears that we responded to those ...

    Comments are closed.0Tips/Support
    Sorry we got cut off, my phone just auto-rebooted
    Sorry we got cut off, my phone just auto-rebooted
    August 21, 2012 Aug 21, 2012 08/21/12
    Raymond C
    Some time ago, I was on the phone when the connection suddenly cut out. I looked at the my phone display and it said, Auto-restart in 7 seconds. The seconds counted down, and then the phone rebooted, and after about ten more seconds, it was back in business, acting like nothing was wrong. (Except that it just terminated a phone call without ...

    Comments are closed.0Non-Computer
    • Page 1
    • Page 2
    • Page 3
    • Next page
    Archive
  • May 2022
  • April 2022
  • March 2022
  • February 2022
  • January 2022
  • December 2021
  • November 2021
  • October 2021
  • September 2021
  • August 2021
  • July 2021
  • June 2021
  • May 2021
  • April 2021
  • March 2021
  • February 2021
  • January 2021
  • December 2020
  • November 2020
  • October 2020
  • September 2020
  • August 2020
  • July 2020
  • June 2020
  • May 2020
  • April 2020
  • March 2020
  • February 2020
  • January 2020
  • December 2019
  • November 2019
  • October 2019
  • September 2019
  • August 2019
  • July 2019
  • June 2019
  • May 2019
  • April 2019
  • March 2019
  • February 2019
  • January 2019
  • December 2018
  • November 2018
  • October 2018
  • September 2018
  • August 2018
  • July 2018
  • June 2018
  • May 2018
  • April 2018
  • March 2018
  • February 2018
  • January 2018
  • December 2017
  • November 2017
  • October 2017
  • September 2017
  • August 2017
  • July 2017
  • June 2017
  • May 2017
  • April 2017
  • March 2017
  • February 2017
  • January 2017
  • December 2016
  • November 2016
  • October 2016
  • September 2016
  • August 2016
  • July 2016
  • June 2016
  • May 2016
  • April 2016
  • March 2016
  • February 2016
  • January 2016
  • December 2015
  • November 2015
  • October 2015
  • September 2015
  • August 2015
  • July 2015
  • June 2015
  • May 2015
  • April 2015
  • March 2015
  • February 2015
  • January 2015
  • December 2014
  • November 2014
  • October 2014
  • September 2014
  • August 2014
  • July 2014
  • June 2014
  • May 2014
  • April 2014
  • March 2014
  • February 2014
  • January 2014
  • December 2013
  • November 2013
  • October 2013
  • September 2013
  • August 2013
  • July 2013
  • June 2013
  • May 2013
  • April 2013
  • March 2013
  • February 2013
  • January 2013
  • December 2012
  • November 2012
  • October 2012
  • September 2012
  • August 2012
  • July 2012
  • June 2012
  • May 2012
  • April 2012
  • March 2012
  • February 2012
  • January 2012
  • December 2011
  • November 2011
  • October 2011
  • September 2011
  • August 2011
  • July 2011
  • June 2011
  • May 2011
  • April 2011
  • March 2011
  • February 2011
  • January 2011
  • December 2010
  • November 2010
  • October 2010
  • September 2010
  • August 2010
  • July 2010
  • June 2010
  • May 2010
  • April 2010
  • March 2010
  • February 2010
  • January 2010
  • December 2009
  • November 2009
  • October 2009
  • September 2009
  • August 2009
  • July 2009
  • June 2009
  • May 2009
  • April 2009
  • March 2009
  • February 2009
  • January 2009
  • December 2008
  • November 2008
  • October 2008
  • September 2008
  • August 2008
  • July 2008
  • June 2008
  • May 2008
  • April 2008
  • March 2008
  • February 2008
  • January 2008
  • December 2007
  • November 2007
  • October 2007
  • September 2007
  • August 2007
  • July 2007
  • June 2007
  • May 2007
  • April 2007
  • March 2007
  • February 2007
  • January 2007
  • December 2006
  • November 2006
  • October 2006
  • September 2006
  • August 2006
  • July 2006
  • June 2006
  • May 2006
  • April 2006
  • March 2006
  • February 2006
  • January 2006
  • December 2005
  • November 2005
  • October 2005
  • September 2005
  • August 2005
  • July 2005
  • June 2005
  • May 2005
  • April 2005
  • March 2005
  • February 2005
  • January 2005
  • December 2004
  • November 2004
  • October 2004
  • September 2004
  • August 2004
  • July 2004
  • June 2004
  • May 2004
  • April 2004
  • March 2004
  • February 2004
  • January 2004
  • December 2003
  • November 2003
  • October 2003
  • September 2003
  • August 2003
  • July 2003
  • Relevant Links

    I wrote a book
    Ground rules
    Disclaimers and such
    My necktie's Twitter

    Categories

    Code
    History
    Tips/Support
    Other
    Non-Computer

    Stay informed

    Login
    Code Block
    What's new
    • Surface Pro 8
    • Surface Laptop Studio
    • Surface Pro X
    • Surface Go 3
    • Surface Duo 2
    • Surface Pro 7+
    • Windows 11 apps
    • HoloLens 2
    Microsoft Store
    • Account profile
    • Download Center
    • Microsoft Store support
    • Returns
    • Order tracking
    • Virtual workshops and training
    • Microsoft Store Promise
    • Flexible Payments
    Education
    • Microsoft in education
    • Devices for education
    • Microsoft Teams for Education
    • Microsoft 365 Education
    • Education consultation appointment
    • Educator training and development
    • Deals for students and parents
    • Azure for students
    Business
    • Microsoft Cloud
    • Microsoft Security
    • Azure
    • Dynamics 365
    • Microsoft 365
    • Microsoft Advertising
    • Microsoft Industry
    • Microsoft Teams
    Developer & IT
    • Developer Center
    • Documentation
    • Microsoft Learn
    • Microsoft Tech Community
    • Azure Marketplace
    • AppSource
    • Microsoft Power Platform
    • Visual Studio
    Company
    • Careers
    • About Microsoft
    • Company news
    • Privacy at Microsoft
    • Investors
    • Diversity and inclusion
    • Accessibility
    • Security
    English (United States)
    • Sitemap
    • Contact Microsoft
    • Privacy
    • Manage cookies
    • Terms of use
    • Trademarks
    • Safety & eco
    • About our ads
    • © Microsoft 2022