Ever since I used Windows NT (for me, the first Windows NT I used is Windows XP), I’ve been familiar with the importance of Ctrl+Alt+Delete. The combination is known as the secure attention sequence for Windows. In an uninfected copy of Windows, the sequence is handled exclusively by Windows, and is used to thwart trojan dialogs luring users’ credentials. Requiring SAS before Welcome Screen is a quite usable security feature. However, it is not the case for Credential User Interface.
Blog entries with tag “Microsoft”
PowerShell 在众 shell 中最突出的特色就是面向对象；然而，世界上还有很多命名是专为字节流管道设计的（兼容性大坑）。PowerShell 对待字节流管道那是十分 nasty！我写的这个小工具可以在对象和字节流之间做完美的润滑。更新：Aloxaf 实现了 Linux 版本的 Use-RawPipeline，起名 Use-PosixPipeline。
Update: I misunderstood how the app was sideloaded. See my further investigation and I apologise for the wrong blames. Hands down! The usage is legitimate and a perfect example of installation on demand (advertisement). Embarassingly bad is for myself.
Sharing data among apps is a common task in modern operating system. Both iOS and Windows Runtime provides central means of transmitting data from one app to another beyond the clipboard. In this entry, I will look at the sharing functionalities in both systems.
PowerShell 6.1.0 (preview) messes verbs of directories, causing Previous Versions to open previous verions of a directory in PowerShell
Issue #6799 in PowerShell repository on GitHub raises the question why Previous Versions is opening previous versions of a directory in PowerShell, instead of File Explorer as expected. The reason is that PowerShell 6.1.0 (preview) installer creates a context menu to open the shell on any folder. However, it unfortunately names the verbs as open/runas, which is very dangerous since they are canonical and do not make much sense for a folder. Related is issue #7815, where shortcuts to a folder are opened in PowerShell.
Outlook 2016 GUI creates an appointment with extraneous attendee, causing Outlook.com and Outlook for iOS to show it as a meeting
Outlook 2016 GUI always creates an event with at least one attendee, which makes Outlook.com and Outlook for iOS have difficulty correctly interpreting the appointment. Instead, they think it is a meeting. However, if you create the event with Outlook object model, there is a good chance the event is created neatly. In addition, events created on Outlook.com or in Outlook for iOS are always neat.
Continuing ‘Hosting a preview handler in WPF, part 1: UI and file associations’, we will do the major COM interop in this entry. Many people have failed to host the handler correctly because of careless implementation, so look carefully! Also, we will demonstrate some broken preview handlers, including ‘Adobe PDF Preview Handler for Vista’, ‘Microsoft Word previewer’ and ‘Microsoft PowerPoint previewer’.
As a fanboy of Raymond Chen, I’m always intrigued by Windows Shell. After his three interesting examples of Reading a Contract From the Other Side, I decided to write one myself. Our victim is Preview Handlers and Shell Preview Host. Today’s entry will prepare UI and file association information retrieval for our little program.
我之前在知乎问题“为什么很多人要禁止 Windows 10 自动更新”下多个回答的评论区宣传 ShutdownBlockReasonCreate 这个 API，尝试“教育”开发者正确处（阻）理（止）Windows 10 自动更新重启带来的关键任务被终止的问题，还因为这个被人挂了。一开始我抱着怀疑的态度提出的方法，之后不知什么原因就假设这个 API 确实有效了——我当时已经知道该 API 不能其效果的情况，但是我没料到“大更新”的时候 Windows 真的会用那么暴力的方法重启电脑。本文记录了一些我的观察，并从使用者的角度给出一些关于 Windows 10 自动更新处理上的建议。
Opening online-only shortcuts (.lnk files) with empty initial working directory ends up inheriting the current directory of the parent process, disregarding the specified working directory
A curious problem I encountered when using Windows PowerShell to backup my Outlook signatures.
Have you ever tried using UseNewEnvironment switch when invoking Start-Process cmdlet? Intuitively, turning it on makes the newly created process use the default environment instead of that of the parent process. However, its semantics is way more complicated, obscure and buggy than the intuition. TL; DR: You rarely want to use this switch.
Someone wanted to know how to create a file that denies itself from being removed, yet found he could still remove the file even denying DELETE access from Everyone. The reason is that there is DELETE_CHILD access on its containing directory. How does this relate to ‘the directory is not empty’?
Clear-RecycleBin is a cmdlet that clears your recycle bin. Internally, it calls SHEmptyRecycleBin function. It has been malfunctioning for a long time: when you run the cmdlet for the first time in a PowerShell session with Force switch on, it produces an ErrorRecord. Further investigation shows that it is detecting error status of SHEmptyRecycleBin the wrong way. To make things worse, SHEmptyRecycleBin is really bad at error handling.
When you open VS2015 Command Prompt from a newly installed instance of Visual Studio 2017 Community, the prompt fails to intialise the variables. Telling you to ‘make sure either Visual Studio or C++ Build SKU is installed’. Searching the Internet, this seems to be a known and persisting issue. Here I propose an elegant workaround for it.
Groove Music allows the user to store their music collection, including songs available via Music Pass subscription, those purchased from the Store, those stored on your OneDrive and those stored locally. This gives the users false impression that purchased music are secured by Microsoft’s service so they’re never lost.