Friday, November 23, 2012

Links to my website are broken

It's probably time to change my DNS registrar... I'm using dotster.com (old namezero.com) for my websites (http://alinconstantin.com / http://alinconstantin.net ), and I just discovered the sites were not forwarding anymore URLs to the dynamic DNS http://alinconstantin.dtdns.net and http://alinconstantin.homeip.net . For some reason, they decided to change the domain from 'URL forwarding' to 'Parked' which pointed to a page with spam links.
I changed that and now the root of the website redirects correctly, but folders and direct page links are still broken, they display some 'page not found' frame with the same spam links instead of redirecting to the matching folder on the dtdns.net site.


I hope this is not some 'feature' added to get more spam clicks from others' domains. If the situation persists, it will be bye-bye namezero/dotster after 10 years of using their services...

Meanwhile, if you can't access direct links to my website, use instead the dynamic DNS addresses I mentioned above.

Wednesday, November 21, 2012

Using the Visual Studio’s Search Control

Visual Studio 2012 uses in a couple of windows a control that allows searching the window content. Examples are Quick Launch, tool windows like Toolbox/SolutionExplorer/ErrorList, etc.

imageimage

The control can be easily reused in your package and added not only into Toolwindows, but to any piece of UI. This article will show you which interfaces to implement or call to implement a searchable dialog or toolwindow, from both native or managed code.

Too many search controls

Various windows in Visual Studio needed search capabilities, and without a common control to use, in time they have implemented their own solutions. Unfortunately, this leads to UI inconsistencies, usability problems and user confusion. In Visual Studio 2010 there were at least 15 different control implementations for the same purpose – simple search. Below are a couple examples of windows from Visual Studio 2012 that still use private implementations (hopefully in time they'll converge and use the common way)

  • Minidump editor window (File/Open/File, pick a dmp file) allows searching in the modules list. Uses WPF edit/button, doesn't have a consistent start icon, no indication the list is filtered, etc.clip_image002
  • VC Project Property pages have an “All options” page that’s searchable yet their box is just an edit that doesn’t offer any indication search is performed.clip_image006
  • TFS Shelvesets, Build Definitions use text box with watermark image (not a button), again there is no no way to easily clear a searchclip_image008
  • Architecture Explorer uses comboboxes, require enter to start search, there is no other indication search is performed.clip_image010

If you’re consider adding search capabilities to a window in your package, please don’t perpetuate these inconsistencies and use the control provided by the shell team; if you find missing features or have suggestions for improvement, you can send mails to VS Shell team to consider including in next versions.

Anyway, back to implementation.

Implementation considerations

The common search control in Visual Studio is implemented as a WPF control (the Microsoft.VisualStudio.PlatformUI.SearchControl class). Its data model set in DataContext property needs to be a Gel Microsoft.VisualStudio.Shell.Interop.IVsUIDataSource with specific properties/verb names; an example of such data source is the Microsoft.VisualStudio.PlatformUI.SearchControlDataSource class. The control can be directly referenced from Xaml, however, to make it work you’d have to deal with data sources (setting the necessary properties when the verbs are invoked, e.g. setting search status ‘in progress’ when StartSearch verb is called, etc, because the UI binds directly to some of the data source properties), with data source wrapper classes that are marked internal, etc. It can be done (the editor team used it this way), but clearly that’s not the intended way to use the control.

Instead, the control should be used through Visual Studio interfaces like IVsWindowSearch, IVsWindowSearchHost, IVsSearchTask, etc. Beside making the control accessible from native code (via COM), this abstracts you from the control implementation and let’s you focus only on setting up the search and performing the searches.

The GenerIC Case

In order to implement a searchable window, the owner needs to implement the IVsWindowSearch interface.

To setup the search, you need to create first a search host. Query the SID_SVsWindowSearchHostFactory service from the shell, and call IVsWindowSearchHostFactory.CreateWindowSearchHost() function. Pass in as first argument an object identifying the control to be used as parent for the search control. The type of pParentControl argument depends on the UI technology used in your window, e.g. FrameworkElement for WPF, ElementHost for WinForms, or an object implementing IVsUIWin32Element/IVsUIWpfElement and returning the parent indirectly via GetHandle() or GetFrameworkElement() methods.

Once you have the search host, call IVsWindowSearchHost.SetupSearch() and pass in the object implementing IVsWindowSearch interface. There are a couple of things happening during this call:

  • The shell creates the SearchControl WPF control child of the pParentControl specified during host creation
  • The shell creates a settings data source and calls IVsWindowSearch.ProvideSearchSetting. Your window gets a chance to override the default values and influence the behavior of the search control (e.g. set a determinate progress type, or change the search to be instant or on-demand, disable MRU items and the popup, etc)
  • The shell calls IVsWindowSearch.ProvideSearchFilters and ProvideSearchOptions to discover filter and options that will be shown (if necessary) in the search control’s popup
  • The shell creates the necessary data sources and associates them with the search control.
  • If the search control uses MRU items, the search control will use the SVsMRUItemsStore to store/retrieve the items under the IVsWindowSearchHost.Category guid.

As the user types in the search control (default using delayed search start) and the search is started, the shell will call IVsWindowSearch.CreateSearch() function. The shell parses the user input and creates an object implementing the IVsSearchQuery interface (this allows for a consistent parsing of search strings into tokens, and identifying some tokens as filtering tokens). In response to the CreateSearch() call, the search control’s user needs to return an object implementing IVsSearchTask. The shell will then call IVsSearchTask.Start() from a background thread to perform the actual search job. Should the user click the X Stop button while the search is running, the Stop() function will be called on the UI thread on the search task. Should the user click the X Clear button after the search completes or is stopped, the shell will call IVsWindowSearch.ClearSearch()

While the search is running, the search task is supposed to call IVsSearchCallback.ReportProgress() if the search control’s progress type was changed to SPT_DETERMINATE. When the search is complete, call ReportComplete to notify completion and the number of results found.

When the search is no longer needed, one can call IVsWindowSearchHost.TerminateSearch() to release early the resources associated with the control, such as the data sources.

Visual Studio also optimizes for the most common use case. To create a searchable toolwindow you don’t have to worry about setting up the search – instead, simply implement the IVsWindowSearch interface on the same class that implements the tool window pane (IVsWindowPane or IVsUIElementPane), and the shell will take from you the burden of setting up the search and will provide a hosting place for the search control in the toolwindow frame area. Even more, classes in Managed Package Framework (MPF) from like Toolwindow already implement the necessary interfaces so you can simply make the search control appear in your window by overriding SearchEnabled property and return ‘true’.

The Search control in managed toolwindows, with shell hosting

Visual Studio SDK Contains a Walkthrough: Adding Search to a Tool Window‎ article which has step-by-step instructions for using the search control in a managed toolwindow. The control is hosted by the shell in the toolwindow frame area, so you don’t need to worry about setting up the search (just override SearchEnabled property). The search-control in the searchable toolwindow from the article supports most recently used (MRU) items, search filters and options, and looks like like this:

SearchableToolWindow

Because the article doesn’t link to a downloadable end-to-end solution that you can try right a way, I’ve made available on my website the sample built from the articles instructions. You can download it from Example.TestToolWindowSearch.zip

 

The Search control in managed dialogs

The Example.SearchControlCS.zip sample demonstrates using the search control from a managed dialog. When built, the sample’s package adds 2 menu items in Tools menu (‘Searchable WinForms dialog’/’Searchable WPF dialog’).

SearchableWindows

Both dialogs set up a search control and implement similar search capabilities – filter a list of fruits with names read from resources.

SearchControlWinFormsSearchControlWPF 

To setup the search, one needs to define a container control that will act as parent for the search control and call IVsWindowSearchHostFactory.CreateWindowSearchHost with that container. For WinForms, the most ‘natural’ container choice type is ElementHost, which ensures WinForms-WPF interoperability. For WPF, just pass in any FrameworkElement (e.g. Grid, Border, etc) and the search control will be added as Child of that element.

The two searchable dialogs are implemented in SearchableForm.cs and SearchableWpfWindow.xaml respectively.

In this example there is only one search control per dialog (and the dialogs are ref counted being managed objects), so it’s easier to just implement the IVsWindowSearch interface directly on the dialogs. Should you need to use more search controls in a dialog you’ll have to create separate objects implementing IVsWindowSearch and pass them to IVsWindowSearchHost.SetupSearch when you create the search controls.

Because I implemented the same kind of search in both dialogs, I was able to reuse the search task class SearchableWindowSearchTask. It derives from VsSearchTask class in MPF and does the real search by overriding OnStartSearch method. It compares the typed user strings (from tokens of the search query) with the known fruits read from resources. The results are added to UI via 2 callback methods, clearResultsCallback and addResultCallback passed in constructor of the search task; this way the class can be used to report the results in both a WinForms ListBox or add them to an ObservableCollection bound to by the WPF dialog’s ListBox.

The OnStopSearch() function on the search task is called by the search control on the UI threads; the base class sets the TaskStatus to Stopped and reports completion so there isn’t need to override this function.

The OnSearchStart() function on the search task is called from background threads. This allows performing the actual search job asynchronously and you’d have to get out of your way to block the UI. The search task uses ThreadHelper.Generic.BeginInvoke() to call the UI update callbacks (because WinForms controls can only be accessed on the UI thread that created them, and also ObservableCollections can’t be modified from more than one thread). To make sure the results are not added to the UI by these callbacks after a search is canceled and the task is stopped, the code needs to recheck the value of TaskStatus on the UI thread before calling the callbacks.

There are a few things necessary mentioning when using the search control in a dialog:

  • By default, the search control uses a color scheme that follows the active theme in Visual Studio (e.g. Light/Dark). A dialog usually does not follow the theme colors, and to avoid having a black search control in a light dialog you’d probably want to set UseDefaultThemeColors property in the data source to False, and the control will use a the default color scheme regardless of the current theme.  There is a Utilities class in the Microsoft.Internal.VisualStudio.PlatformUI namespace that allows easier interaction with Gel data sources:  Utilities.SetValue(pSearchSettings, SearchSettingsDataSource.PropertyNames.UseDefaultThemeColors, false);
  • The search control uses data source properties that allows it to resize between Min/Max values (default 100/400). The control’s width will probably not fit by default all the parent container’s width, so you’ll need to set a larger ControlMaxWidth value to make sure the control will stretch to all available space from parent. E.g. use the dialog’s width: Utilities.SetValue(pSearchSettings, SearchSettingsDataSource.PropertyNames.ControlMaxWidth, (uint)this.Width);

Managed Vs. Native Windows

If you have the choice in your window that needs to use search, go with managed implementation. Using the search control from managed code is simpler, as there are a lot of helper functions and classes in Managed Package Framework that helps you with the implementation.

  • The ToolWindowPane class already implements IVsWindowSearch interface, so if your toolwindow derives from this you can quickly made a toolwindow searchable by overriding SearchEnabled=true.
  • The VsSearchTask class can be used as a base class for your search task, to implement the IVsSearchTask members and let you focus on the actual search (derive from it and override OnStartSearch)
  • Classes like WindowSearchBooleanOption and WindowSearchCommandOption in Microsoft.VisualStudio.PlatformUI namespace allow to easily define search options (shown in the search control’s popup as checkboxes or links). The WindowSearchOptionEnumerator class can be used to return a VS-style enumerator over IEnumerable list of search options to be easily returned from IVsWindowSearch.ProvideSearchOptions.
  • The WindowSearchSimpleFilter class allows implementing a search filter (shown in popup as a button) by specifying just the name and filter field. For more advanced filtering derive from WindowSearchCustomFilter class. The WindowSearchFilterEnumerator class can be used to return a VS-style enumerator over IEnumerable list of search filters to be easily returned from IVsWindowSearch.ProvideSearchFilters.
  • There are function like SetValue/GetTypedValue in Microsoft.Internal.VisualStudio.PlatformUI.Utilities class that allow providing search control’s settings in the data source without having to deal with IVsUIObjects
  • There is another utility class, Microsoft.VisualStudio.PlatformUI.SearchUtilities that has methods for creating search queries (IVsSearchQuery) or search tokens from strings, parsing search queries into tokens, etc.

If you choose for a native implementation, you’d have to deal with all the above yourself. You’d have to create your own COM classes even for something simple like changing search control’s setting. In the examples below I’ll give you some sample implementations for IVsUIObjects, IVsSearchTask, IVsWindowSearch, if you have to use filters or options you’d have write your own classes.

In addition, using the search control in a native dialog requires more code to write to ensure Win32-WPF keyboard interoperability and there are also some bugs (more on this later).

The Search control in NATIVE TOOLWINDOWS aND DIALOGS

The Example.SearchControlCpp.zip sample demonstrates using the search control from a native toolwindow and dialog. When built, the sample’s package adds 2 menu items in Tools menu (‘Searchable Native Dialog’/’Searchable Native Toolwindow’).

SearchableWindowsNative

The two menu commands display a dialog and a toolwindow like these:

SearchControlNativeDialog

SearchControlNativeToolwindow

To use a Win32 window as the search control’s parent, one needs to pass in an object implementing IVsUIWin32Element interface and returning the HWND of the parent window from the GetHandle() function. The class CWin32Element does exactly that. The sample uses a Static Win32 control for the search control’s parent.

For both dialog and toolwindow (in SearchControlCppWindowPane and SearchControlCppDialog), the search is setup from OnInitDialog() function that is a handler for dialog’s creation message WM_INITDIALOG.

As mentioned above, there is no help from the native VSL (Visual Studio Template Library in SDK) on dealing with the search interfaces. The example defines its own COM classes CMyDialogWindowSearch (implementing IVsWindowSearch), CMySearchTask (implementing IVsSearchTask). If you need to use filters or options with the search control you’d also need to create your own classes implementing IVsWindowSearchSimpleFilter, IVsWindowSearchCustomFilter, IVsWindowSearchBooleanOption, IVsWindowSearchCommandOption and the enumerators IVsEnumWindowSearchFilters, IVsEnumWindowSearchOptions.

Also, in providing search control settings (e.g. for setting the search type to instant search), you’d have to pass in property values which are objects implementing IVsUIObject interface. In the sample I’m defining a class CVsUIBuiltInPropertyValue that can be used to create values for built-in Gel data types (int, strings, booleans, etc) and a couple of functions like Gel::CreateBuiltInValue to easily create such property values.

The 2 properties mentioned above for using the search control in managed dialogs (UseDefaultThemeColors and ControlMaxWidth) will need to be set for native dialogs, too. In addition, there are a couple of gotchas for using the search control in a native dialog:

  • To ensure the Win32 dialog forwards keyboard input to the WPF control, the HwndSource window created by the search host, child of the dialog needs to intercept the WM_GETDLGCODE message and return DLGC_WANTCHARS | DLGC_WANTTAB | DLGC_WANTARROWS | DLGC_WANTALLKEYS to indicate it wants to process keyboard input. The SearchControlHostProc is the subclass proc that does this.
  • To ensure correct tabbing into the search control I’m subclassing the Static parent of the search control, intercepting WM_SETFOCUS messages and forwarding focus activation to the HwndSource child. WPF will further focus the SearchControl. The SearchControlParentProc is the subclassed window proc of the Static control.
  • To ensure tabbing out the search control, I’m intercepting WM_CHAR(VK_TAB) on the HwndSource and focusing the next parent dialog’s control in tab order.

All these could be done by the VS shell on your behalf, so hopefully in a future VS version these will no longer be necessary from the search implementer…

And there is another problem you may have noticed in the screenshot above: if the height of the parent Static control is bigger than needed by the search control, a black band appears under the search box. This is a bug that will have to be fixed in VS side (set the background brush on the HwndSource at creation time).

Samples used in the article

Friday, September 14, 2012

Using color themes with Visual Studio 2012 Express Editions

 

Visual Studio 2012 ships out of the box with 2 color themes, Light and Dark. Many users have complained the Light theme is too gray, depressing and ugly, some went as far as to claim they’d commit suicide if they’d be forced to look a whole day to this UI.

Personally I think that’s an exaggeration. However, while I absolutely like the Dark theme, and I could use the Light theme without problems, sometimes I’d prefer a bit more color.

For Visual Studio 2012 Professional/Premium/Ultimate there is a free Visual Studio 2012 Color Theme Editor extension that Matt Johnson wrote. It adds a couple color themes such as Red, Green, Blue, Purple, Tan, Dark with Light editor, Light with Dark editor. It also allows creating new themes, editing colors, etc.

screenshot 

Unfortunately, the extension is not available for Express editions of Visual Studio (and usually Express editions don’t allow loading extensions). It seems like on Express you’d be forced to use only the Light/Dark themes… Well, that’s not true!

Below I’ll tell you how to install the color themes on a Visual Studio 2012 Express, and I’ll exemplify with the newly released Visual Studio Express for Windows Desktop.

 

1) First, download the zip file http://www.alinconstantin.net/download/VS2012Themes.zip – it contains the 7 pkgdef files defining the colors of the default themes from Matt’s extension.

2) Now, create a folder under "%ProgramFiles%\Microsoft Visual Studio 11.0\Common7\IDE\WDExpressExtensions”, and lets name it “Themes”. Unpack the zip file in that folder.

Pkgdefs

3) Open a ‘Developer Command Prompt for VS2012” window. In the command line, type “wdexpress.exe /updateconfiguration”. This will make Visual Studio to read the pkgdef files on next restart, and import the color themes into registry.

wdexpressupdateconfig

4) Launch Visual Studio Express, and now you should be able to see the new themes and switch them in Tools/Options dialog, Environment/General tab

RedWDExpress

 

Should someone with a VS Professional/Ultimate install use Matt’s extension to create/edit a custom theme that you want to use on Express, that’s also possible. On the machine with the VS install look under ‘%LocalAppData%\Microsoft\VisualStudio\11.0\Extensions’ folder. There should be some subfolders with random names, and one of them will contain a Colors.pkgdef file containing the theme of interest (open it with notepad and you should see in the beginning the theme’s name to confirm). Copy that file in the WDExpressExtensions\Themes folder, rename it to give it a more appropriate name (repeat steps 2-4), and you should be able to use the new custom theme.

Friday, August 31, 2012

Windows Live Mesh 2011 and Windows Essentials 2012

As you may know, Microsoft has replaced Windows Live Mesh from Windows Live Essentials 2011 with Microsoft

SkyDrive in the updated Windows Essentials 2012. While SkyDrive offers new interesting sync functionality, it does not completely replace all the functionality you had with Windows Live Mesh. I used to have a folder shared with my parents and sister where we could easily exchange pictures just by dropping new files in a local folder and have the file appear on my parent’s computer without any action necessary from their part. While Skydrive can be used for sharing, it requires my parents to look on the web in my Skydrive folder and manually download new files. (Why, Microsoft this usability regression?) If you’re like me and miss the removed functionality, please spend a few minutes and give Microsoft feedback about SkyDrive, if we’re many sending feedback hopefully Microsoft may reconsider the current decision.

Anyway, while I like the updated functionality from MovieMaker, SkyDrive, etc, I still want to run Live Mesh. But upgrading to Windows Essentials 2012 (downloadable from Essentials installer files for Windows 7, Windows 8, and Windows Server 2008 section) will remove Windows Live Essentials 2011 (downloadable from Essentials installer files for Windows Vista section). And the later will not install if you have already installed/upgraded to the 2012 version. Sad smile

So, here is how to install Windows Live Mesh 2011 after installing Windows Essentials 2012:

- open an elevated command prompt

- cd %ProgramFiles%\Common Files\Windows Live\ (or “Program Files (x86)” on 64-bit OS-es)

- make sure you exit any running Windows Live program (Messenger, Writer, etc)

- “attrib –s –h .cache” to change the attributes of the .cache folder

- delete the folder “rmdir /q/s .cache”

- now you can run the wlsetup-all.exe from Windows Live Essentials 2011 (download links above) and it won’t complain anymore about the newer version installed.

I got the idea after finding Jonathan’s blog, where he made available for download a Live Mesh Installer tool: http://messengergeek.wordpress.com/2012/08/09/installing-windows-live-mesh-2011-with-windows-essentials-2012/ The tool downloads WLE2011 web version and installs it even if you have 2012 version installed. It didn’t work for me (it failed to delete the .cache folder, I may have had WL programs running), but at least it pointed me in the right direction to which folder needs to be manually deleted to make things work. Thanks!

Thursday, August 30, 2012

Package-registered browsers/previewers in Visual Studio

Over the last months I’ve been asked twice how should a Visual Studio package register a new standard previewer that will show up in the BrowseWith… dialog. It turns out that MSDN documentation is not very explicit about what’s possible and what’s not. Also, there are a couple of holes in Manage Packet Framework (MPF) that will need additional explanation to avoid them. So here’s this article and sample hoping to bring some light.


In Visual Studio, when you right click a html file in Solution Explorer and choose BrowseWith… you can access a dialog listing all system-installed browsers (auto-detected by Visual Studio), package-registered browsers or browsers added explicitly by the user.

image

image

image


For user-registered browsers, in Visual Studio 2012 the “Add program” dialog has been changed to allow specifying explicitly program’s arguments, and the code has been changed to support saving and passing the arguments at the browser’s invocation time. (To some extent arguments could have been passed in VS2010 as well in the Program edit box, but that was not evident to the user, plus there were bugs that caused the arguments to be discarded in various situations).


Packages can also register browsers via the SVsUIShellOpenDocument service. Here is how adding a new browser is supposed to work:

1) the package should write a key under “Visual Studio\11.0\AddStandardPreviewer” with the package Guid. Unfortunately there is no RegistrationAttribute helper class in MPF that can be used to declare these keys, so you’d have to write your own.

2) at the appropriate time, the environment parses the registry entries and calls ResetDefaults, passing in a value of PKGRF_ADDSTDPREVIEWER for the grfFlags parameter on the VSPackage. Unfortunately, the Package class in MPF already implements ResetDefaults() and does not allow derived classes to override virtual functions for registering previewers.

3) at that point the VSPackage should call IVsUIShellOpenDocument.AddStandardPreviewer. The function however does not have an explicit argument for passing browser’s arguments (it only has ‘string pszExePath’ suggesting the browser’s executable and not the actual command line string), so it may not be clear this thing is possible/supported.

To demonstrate how a package can register a browser, I wrote a sample, Example.BrowseWithExplorer.zip that implements a package registering 2 browsers: Internet Explorer InPrivate (allowing InPrivate previewing of the file of interest) and Internet Explorer Kiosk (which opens the browser without toolbars, menus, status bar, tabs, etc. – to close the browser use Alt-F4).

 

Example.BrowseWithExplorer

The sample defines a registration attribute, ProvideStandardPreviewerAttribute, that can be used on the package class to declare the package will register standard previewers. Hopefully, future versions of MPF will include such class so you won’t have to write your own.

regprev

Then, the package will have to re-implement the IVsPackage interface as shown in the above picture, and re-implement the ResetDefaults method so it can intercept the calls with __VSPKGRESETFLAGS.PKGRF_ADDSTDPREVIEWER flag

image

As for the browser’s invocation, when registering a standard previewer, the first argument in the AddStandardPreviewer allows specifying command line arguments for the previewer in addition to the path to the browser's executable. If there are no quotes in the path, the whole string is assumed to be the full path to the binary exe file of the previewer. However, if the pszExePath string beings with a quote (quotes are used around the executable binary) then arguments can be added separated by a space from the quoted filename.

%1, %URL or %url can be used in the arguments list, and Visual Studio will replace it at runtime with the name of the file to be previewed, (as a URL-formatted quoted string, e.g. "file:///C:/temp/My%20File.txt" ).  If the arguments don't contain either of %1, %URL, %url, then Visual Studio will append the file name to be previewed to the pszExePath string before launching the previewer process with that concatenated string as arguments.
Multiple previewers can be registered with the same executable path if the list of arguments passed are different.

The 2 browsers registered by the sample invoke “IExplore.exe –k [filename]” for the Kiosk mode and “IExplore.exe –private [filename]” for InPrivate browsing, as described in Internet Explorer Command-Line Options MSDN article.


And finally, a few words about the system browsers listed in the dialog. When the OpenWith… dialog is displayed, Visual Studio will try to detect the browsers installed on the system. These browsers cannot be deleted from the dialog (well, you can delete them but they will re-detected and will appear back next time the dialog is reopen, unless the browser has been uninstalled at that point). In order to detect system browsers, Visual Studio looks in a couple of known locations:

- The shell\open\command for the ProgID associated with the http protocol for the current user or with the .htm files.

- The Default value under HKLM\Software\Microsoft\Windows\CurrentVersion\App Paths\[Executable.exe] or HKCU\Software\Microsoft\Windows\CurrentVersion\App Paths\[Executable.exe]

- HKCR\Applications\[Executable.exe]\Shell\Open\Command, for a couple of known executable of browsers with highest market use share.

- HKCU\SOFTWARE\Clients\StartMenuInternet and HKLM\SOFTWARE\Clients\StartMenuInternet, as described in this MSDN article http://msdn.microsoft.com/en-us/library/dd203067%28VS.85%29.aspx

Some browsers don’t write any version-independent registry values that can be used to locate their executable, hence they are not listed in the dialog unless they are also made the default system browser. Current examples of browsers with bad registration are SRWare Iron, Maxthon, Lynx. System browsers are encouraged to write their registration under StartMenuInternet so they can be detected by Visual Studio and Windows (and be listed in Windows’ Change Program Defaults dialogs as well).


The sample in this article can be downloaded from: http://www.alinconstantin.net/Download/Example.BrowseWithExplorer.zip

Wednesday, August 29, 2012

Notepad.exe command line arguments

I was looking for Notepad’s arguments for a sample I’m thinking of writing; I’ve searched the net and found some of these, and had to investigate a bit to find out about the others. I’m a bit surprised it only supports so few flags, I was expecting at least a “go to line” capability. Anyway, here they are:

/A      Ansi: notepad /a file.txt Opens the specified file as Ansi (overrides encoding auto-detection)

/W      Wide: notepad /w file.txt Opens the specified file as Unicode (overrides encoding auto-detection)

/P      Print: notepad /p file.txt Opens the file, prints its content to the default printer and exit

/PT     PrintTo: notepad /pt “file.txt” “<printername>” prints the file to the specified printer. Both the filename and the printer name have to be in quotes, regardless of the names containing spaces or not. E.g.: notepad /pt “file.txt” “Send To OneNote 2013” or notepad /pt “file.txt” “\\Server\SharedPrinter

/.SETUP SetupMode: E.g. notepad /.setup file.txt.  I’m unclear what this is used for. It’s a weird mode, it does not repaint the window if it was started restored. You’d have to press Alt-Space and Maximize it to view the file content. The window has 2 sets of scrollbars in that case (one set is apparently unused), and it closes if Escape or Ctrl+D are pressed. Perhaps some setup programs invoke notepad with these arguments to display the EULA? Who knows.

 

That being said, for a better small & fast replacement of notepad, I suggest using SaneStudio’s NitroLite, downloadable from http://sanestudios.com/n2.html. No installation needed, at only ~100kb, it packs loads of features, syntax coloring, binary editor, etc.

Friday, August 17, 2012

Windows update error 0x8024402F

I run yesterday into a weird error, for which I spent half of day to solve the problem. It’s unlikely you’d run into the same problem, so this is more for me to remember what I did to fix it in case I run into this again…

Yesterday I upgraded my laptop to Windows 8 Pro and installed Office 2013 Consumer Preview (upgrade from Win7 Ultimate/Office 2010). After the upgrade, when I tried to install latest Windows updates, I kept getting error 0x8024402F.

I tried the Help page on the error code, I launched the troubleshooter there (which claimed it could be a problem with the server connection, and claimed to have applied fixes), but all lead to nothing.

Knowing in the past I had trouble with Windows Update I searched my blog, which pointed out to problems related to UseWUServer set when I joined CorpNet. I left corp.microsoft.com domain and joined my home domain, but that only cost me 2 reboots and still didn’t fix anything.

I searched the the net for the error code, I found more KnowledgeBase pages with more FixIt installers which also did not fix the problem.

From http://support.microsoft.com/kb/836941 I found out the error code means WU_E_PT_ECP_SUCCEEDED_WITH_ERRORS. Further searches on the named error pointed to a WindowsUpdate.log file (instructions for reading it are at http://support.microsoft.com/kb/902093).

I looked in the log file and it contained more error details like this:

1060 15a8 PT WARNING: ECP: Failed to validate cab file digest downloaded from http://www.download.windowsupdate.com/msdownload/update/software/svpk/2008/06/1319061_d1590aa04b224974f0cf46ee7937bda90a815268.cab with error 0x80246003

Great, now I was looking for a different error code, 0x80246003. A search on the error number on Internet didn’t find any solution. The only thing I could find is a KB page http://support.microsoft.com/kb/938205 where I learned the error code 0x80246003 is WU_E_DM_UNKNOWNALGORITHM “A download manager operation could not be completed because the file metadata requested an unrecognized hash algorithm.”
Further searches on the named error lead nowhere. I tried re-registering the cryptographic providers dlls, comparing with other machines where things were working, all to no avail.

I run ProcMon searching for failures (when in doubt, run Process Monitor), but again this didn’t help.

I searched the internal Corpnet site for the error code or named error, but that also didn’t lead to a solutions.

Ultimately, I searched the source code. The error code is returned from only one place, from a failed test checking whether test keys are allowed. This had 2 parts:

- checking whether I had a file AUTest.cab in %windir%\SoftwareDistribution folder

- checking whether HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Test\AllowSHA1ContentHash = (dword)1

ProcMon should have shown these as well (at least the first one, to begin with), probably I just missed the line between so many other failures.  Anyway, I set easily the registry value, but I didn’t have the file on any other machine where things were working fine.

After more CorpNet searches I found on http://mswikis/wukipedia/Wiki%20Pages/What%20is%20autest.cab.aspx where to get this test cab file (I needed to obtain a latest version anyway, since the file is signed and expires every 2 weeks).

I copied it to SoftwareDistribution folder, stopped and restarted the Windows Update service (‘net stop wuauserv’/’net start wuauserv’), and next time I tried Windows Update the update finally succeeded! After that I deleted the test cab file, and after that the updates still seem to work fine.

I suspect some internal test qfe was installed on my laptop when I joined CorpNet a while ago (giving the old ‘svpk/2008/06’ date of the update, suggesting some Win7 pre-service pack timeframe), and it was causing trouble now.

Anyway, I’m glad the problem seems fixed, but just in case here is this article to remind me the solution in case I run into this ever again.

Thursday, August 9, 2012

How to Shut Down or Restart Windows 8 when connected via Remote Desktop

 

If you connect via Remote Desktop /Terminal Services to a machine running Windows 8 and have tried to shut it down or restart it, you may have hard times finding out how to shut it down.

Normally, a Windows 8 machine can be restarted by accessing the Settings screen by pressing WinKey+I (or by accessing Charms with WinKey+C and clicking the bottom Settings icon), then by clicking the Power button and selecting Restart / ShutDown from the menu that open.

However, when connected via Remote Desktop, Windows 8 offers in the menu only a “Disconnect” option…

CharmsSettings

Another way to access usually the restart options are to press Ctrl+Alt+Del , then click the Power button there and select Restart / Shut Down from the menu that opens. When connected via Remote Desktop, you can access the power button with Ctrl+Alt+End ( Ctrl+Alt+Del displays the lock screen on the host machine, not on the machine you’re connected to), but again Windows 8 offers there only the “”Disconnect” option (despite the tooltip on the button indicating Shut Down).

CtrlAltEnd

 

So, how to restart Windows 8 when connected via Remote Desktop?

Since most of the time I have a Command Prompt window open (can easily open one with WinKey+R, type “cmd” and Enter), until now I’ve restarted the machine by typing “shutdown –r –f” in the command window, then agreeing with a notification that Windows will soon restart, or waiting ~30 seconds for the machine to restart automatically. If you just need to shut down the machine, don’t pass the “-r” argument.

ShutdownRF

Today I found out another way to restart the computer: you can access the desktop (e.g. by pressing WinKey+D = Desktop, or WinKey+M = MinimizeAll), then press Alt+F4.  This displays a Shut Down Windows dialog, where all the options are available! Ah, the good ol’ Desktop…

AltF4

And, finally if you are a mouse person and prefer a one-click solution, you can create a shortcut to shutdown.exe, then right click it and pin the shortcut to the StartMenu. From now on you’ll be able to shutdown the machine by double clicking the icon on the Start screen or on desktop.

ShutdownShortcut

Monday, August 6, 2012

How to implement a Quick Launch search provider for Visual Studio 2012


A new feature in Visual Studio 2012 is the Quick Launch which allows searching menu items, tools options, and various other things in VS. It drives its roots from a similar feature provided in Visual Studio 2012 part of the Productivity Power Pack under the Quick Access name.
QuickLaunch

The following article will tell you how to write a Visual Studio Search Provider integrating with Quick Launch and will demonstrate the functionality with a sample

Visual Studio 2012 comes with only 4 providers out of the box: menu item, tools options, open documents and most-recently used items. Additional providers can be implemented to extend Quick Launch searches. I believe Microsoft will provide more extension packages and samples but until it does, I’m providing here a primer for writing a new search provider and a sample implementing 2 providers: Fruits and Vegetables, providing their results from 2 hardcoded lists of items.
QLFruitsAndVeggies
While Quick Launch is the official feature name, the Visual Studio interfaces supporting the feature use GlobalSearch in the name. The QuickLaunch feature can be accessed from the SVsGlobalSearch service that implements IVsGlobalSeach and IVsGlobalSearchUI interfaces.
Providers for Quick Launch are objects implementing the IVsSearchProvider interface. They are identified by their unique id (GUID), and they also need to have a unique shortcut string (more on this later).
There are 2 ways to register a new provider for Quick Launch:
1) Dynamic: a loaded package can use IVsGlobalSearch.RegisterProvider interface and pass in the provider object. Dynamic providers can also be unregistered when no longer needed; static providers cannot be unregistered. The provider is available only after the package is loaded; packages may need to use auto-load feature in VS to make sure they get loaded before the user needs their search features. Due to an implementation detail, you can’t use in the same package both dynamic and static registered providers (at least in VS2012 RTM).
2) Static: This is the most common way. In the appid’s configuration hive, under the SearchProviders key, create a subkey with the provider’s Guid, and under it declare the Package Guid implementing the provider. The Name is optional, but is recommended to write one so the providers can be quickly identified at a glance in registry.
[HKCU\Software\Microsoft\VisualStudio\11.0_Config\SearchProviders\{9ba8f997-b098-41c9-b360-fecaa397c94f}]
“Name”=”Fruits search provider”
“Package”=”{0bdb8b31-2ee3-4cd9-893a-d0b11d335f06}”


When the providers are loaded, Visual Studio loads the package implementing the provider. The package must implement the IVsPackageExtensionProvider interface, and Visual Studio will call the CreateExtensionInstance with extensionPoint = IVsSearchProvider interface’s guid, and the interface = guid identifier of the search provider (as declared in registry). The package can then create an instance of the search provider and return the object.


When implementing managed search providers, all this extensibility hook-up can be automatically done by using classes from Microsoft.VisualStudio.Shell.11.0.dll.


1) First, make sure the class implementing the search provider is attributed with the Guid identifying the provider


image








2) Derive the package class from the ExtensionPackage class in Microsoft.VisualStudio.Shell namespace


3) Declare the search provider with ProvideSearchProvider registration attribute on the package class.


image


As mentioned before, search providers are identified by 2 things:


- the provider ID, a Guid


- the provider shortcut: this is a fixed string (in the sample case, “fruits” or “veg”) which allows performing searches only against this provider, e.g. “@fruits apple” will search for “apple” only in the fruits search provider


One of the most important functions in a search provider is the CreateSearch function. Providers are called to create search tasks for the user’s input, then tasks are called on background threads to perform the actual search.  To implement a search task I recommend deriving from VsSearchTask in MPF which provides default implementations for IVsSearchTask interface, tracking search status, or notifying the global search manager about the task’s search progress. Usually, if you derive from the class you only have to override and implement the OnStartSearch method, which lets you focus on the important part – perform the actual match/search.


Search tasks have to perform very fast. The search manager will only display results that are returned in the first 1000ms, to avoid results and user’s selection ‘jumping’ in the pane after a certain time. If you don’t see any results from your search provider in the pane, it’s either you haven’t reported any results within 1s, or there are many search providers installed in the system and there wasn’t place in the popup to display results from your provider after displaying up to 3 items from other search providers that reported results faster, or from the built-in providers. When reporting search results resultant of slow operations (such as http:// queries to some online search service), it is advisable to query for only top 5-10 items that match, such that the web query return faster and you get to report at least 1 results in the first second.


Download the Quick Launch Sample



http://www.alinconstantin.net/download/Example.QuickLaunchSearchProvider.zip

Thursday, August 2, 2012

Command Window is not available in Visual Studio Express editions

 

As other users have noticed in posts like this one, Command Window is a toolwindow that isn’t available in Visual Studio editions to be explicitly displayed by the user.  The menu commands used to display the window are not available.

Fortunately, there are workarounds.

Immediate Window is another related toolwindow that can be used to display variables’ values, evaluate expressions, and to execute commands. The Immediate Window is automatically displayed when entering Debug mode. It can also be displayed on-demand by using the Debug/Windows/ImmediateWindow (Ctrl+D, I) menu item.

Command Window displays automatically a “>” prompt and the user only has to type command names. To execute commands in Immediate Window, the user has to explicitly type the commands by prefixing them with “>”. Full Intellisense support is available here, same as in Command Window. Pre-defined aliases also work fine (of course, trying to execute commands that don’t exist, aka forcing the display of CommandWindow won’t work).

image

A second workaround is to use the Find combobox.

First, make sure the Find combobox is displayed in the Standard toolbar (in Visual Studio 2012 this has been hidden with the command bar reduction work, so you’ll have to use the quick customize menus to bring it back)

image

Then, in the Find combo you can type commands by starting them with “>”, and the full functionality of Command Window will be available there (with Intellisense, aliases like “of”, etc).

image

The only Professional feature related to Command Window that can’t be workaround in Express editions is redirecting the output to a file. The Tools.LogCommandWindowOutput (“log” alias) and Tools.ImmediateMode (“immed” alias) are not available either. Anyway, you won’t need the last one since you are already in Immediate Window, can manually display the toolwindow or execute “>Debug.Immediate” instead from Find combo.

Monday, April 2, 2012

Bing reflection

In case you missed it, Bing home page had today an interesting effect: a reflection of the logo and search box on the water in the animated background image - and the reflections were waving with the water waves...


video

Bing used animated backgrounds before, but I think this is something new. I'm not sure if this was some sort of April's Fool or a new trend in Bing homepages, but I liked the idea.