Registering a Legacy Language Service

The following sections provide lists of registry entries for the various language service options available in Visual Studio.

In the following list of registry entries, VS Reg Root is equal to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\X.Y, where X.Y is the Visual Studio version number.

Registry Entries for Language Service Options

The VS Reg Root\Languages\Language Services\Language Name key can contain the following values.

Name Type Range Description
(Default) REG_SZ <GUID> GUID of the language service.
LangResID REG_DWORD 0x0-0xffff String resource identifier (ResID) for the localized text name of the language.
Package REG_SZ <GUID> GUID of the VSPackage.
ShowCompletion REG_DWORD 0-1 Specifies whether the Statement completion options in the Options dialog box are enabled.
ShowSmartIndent REG_DWORD 0-1 Specifies whether the option to select Smart indenting in the Options dialog box is enabled.
RequestStockColors REG_DWORD 0-1 Specifies whether custom or default colors are used to color keywords.
ShowHotURLs REG_DWORD 0-1 Specifies whether the user can click URLs.
Default to Non Hot URLs REG_DWORD 0-1 Specifies the initial setting for the Enable single-click URL navigation option in the Options dialog box.
DefaultToInsertSpaces REG_DWORD 0-1 Specifies whether the language service has "insert spaces" as its default tab option.
ShowDropdownBarOption REG_DWORD 0-1 Enables or disables the Navigation bar option in the Options dialog box that shows or hides the Navigation bar.
Single Code Window Only REG_DWORD 0-1 Enables or disables the New Window choice in the Window menu for a language service.
EnableAdvancedMembersOption REG_DWORD 0-1 Enables or disables an Options dialog box setting for Hide Advanced Members.
Support CF_HTML REG_DWORD 0-1 Specifies whether the editor enables copying and pasting of HTML data.
EnableLineNumbersOption REG_DWORD 0-1 Specifies whether the Line numbers options in the Options dialog box is enabled for a language service.
HideAdvancedMembersByDefault REG_DWORD 0-1 Specifies whether advanced members such as private fields are hidden in completion lists.
ShowBraceCompletion REG_DWORD 0-1 Specifies whether the Brace completion option in the Options dialog box is enabled.

Example

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\8.0Exp\
  Languages\
    Language Services\
      C/C++\
        (Default)             = reg_sz:{B2F072B0-ABC1-11D0-9D62-00C04FD9DFD9}
        LangResID             = reg_dword:0x00000000
        Package               = reg_sz:{8C2EA640-ABC1-11D0-9D62-00C04FD9DFD9}
        ShowCompletion        = reg_dword:0x00000001
        ShowSmartIndent       = reg_dword:0x00000001
        ShowDropdownBarOption = reg_dword:0x00000001

Registry Entries for Debugger Languages Options

The VS Reg Root\Languages\Language Services\Language Name\Debugger Languages\GUID\ key can include the following values.

Name Type Range Description
(Default) REG_SZ text The default value can be used to document the name of the language. The name of this key is a GUID of an expression evaluator that has a corresponding entry in <VS Reg Root>\AD7Metrics\Expression Evaluator.

Example

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\8.0Exp\
  Languages\
    Language Services\
      C/C++\
        Debugger Languages\
          {3A12D0B7-C26C-11D0-B442-00A0244A1DD2}\
            (Default) = reg_sz:C++

Registry Entries for Editor Tools Options

You can add registry keys under the EditorToolsOptions key for property pages and property nodes. These keys and their values identify property pages in the Options dialog box (on the Tools menu) that are used to configure the language service. In the following example, Page Name is the name of a property page, and Node Name is the name of a node in the tree on the Options dialog box. The page entry and the node entry must be specified separately.

Name Type Range Description
(Default) REG_SZ ResID The localized display name of this option page. The name can be literal text, or #nnn, where nnn is a string resource ID in the satellite DLL of the specified VSPackage.
Package REG_SZ GUID The GUID of the VSPackage that implements this options page.
Page REG_SZ GUID The GUID of the property page to request from the VSPackage by calling the GetPropertyPage method. If this registry entry is not present, the registry key describes a node, not a page.

Example

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\8.0Exp\
  Languages\
    Language Services\
      CSharp\
        EditorToolsOptions\
          Formatting\
            (Default) = reg_sz:#242
            Package   = reg_sz:{A066E284-DCAB-11D2-B551-00C04F68D4DB}
            General\
              (Default) = reg_sz:#255
              Package   = reg_sz:{A066E284-DCAB-11D2-B551-00C04F68D4DB}
              Page      = reg_sz:{3EB2CC0B-033E-4D75-B26A-B2362C25227E}
            Indentation\
              (Default) = reg_sz:#250
              Package   = reg_sz:{A066E284-DCAB-11D2-B551-00C04F68D4DB}
              Page      = reg_sz:{5E21D017-6D2A-4114-A1F1-C923F001CBBB}
            Newlines\
              (Default) = reg_sz:#253
              Package   = reg_sz:{A066E284-DCAB-11D2-B551-00C04F68D4DB}
              Page      = reg_sz:{607D8062-68D1-41E4-9A35-B5E7F14D0481}

Registry Entries for File Name Extension Options

The entry for the file extension should include the leading period, for example ".myext".

Name Type Range Description
(Default) REG_SZ GUID Service GUID for the default language service for this file name extension type.

Example

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\8.0Exp\
  Languages\
    File Extensions\
      .cpp\
        (Default) = {B2F072B0-ABC1-11D0-9D62-00C04FD9DFD9}

Registry Entries for Editor Options

The VS Reg Root\Editors key can contain the following values:

Name Type Range Description
(Default) REG_SZ "" Unused; you can put your name here for documentation.
DefaultToolboxTab REG_SZ "" Name of the toolbox tab to make default when the editor is active.
DisplayName REG_SZ ResID Name to display in the Open With dialog box. The name is the string resource ID or a name in standard format.
ExcludeDefTextEditor REG_DWORD 0-1 Used for the Open With menu command. If you do not want to list the default text editor in the list of available editors for a specific file type, set this value to 1.
LinkedEditorGUID REG_SZ <GUID> Used for any language service that can open a file with codepage support. For example, when you open a .txt file by using the Open With command, options are provided for using the source code editor with and without encoding.

The GUID specified in the name of the subkey is for the codepage editor factory; the linked GUID specified in this specific registry entry is for the regular editor factory. The purpose of this entry is that if the IDE does not open a file by using the default editor, the IDE will try to use the next editor in the list. This next editor should not be the codepage editor factory because this editor factory is basically the same as the editor factory that failed.
Package REG_SZ <GUID> VSPackage GUID for the display name's ResID.

Example

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\8.0Exp\
  \Editors\
    {8281C572-2171-45AA-A642-7D8BC1662F1C}\
      (Default)            = reg_sz:Html Editor with Encoding
      DefaultToolboxTab    = reg_sz:HTML
      DisplayName          = reg_sz:#20101
      LinkedEditorGUID     = reg_sz:{C76D83F8-A489-11D0-8195-00A0C91BBEE3}
      Package              = reg_sz:{1B437D20-F8FE-11D2-A6AE-00104BCC7269}

Registry Entries for Logical View Options

The VS Reg Root\Editors\Editor GUI>\LogicalViews key can contain the following values.

Name Type Range Description
(Default) REG_SZ Unused.
<GUID> REG_SZ "" Key to the logical views supported. You can have as many of these as you need. The name of the registry entry is what is important, not the value, which is always an empty string.

Example

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\8.0Exp\
  \Editors\
    {8281C572-2171-45AA-A642-7D8BC1662F1C}\
      LogicalViews\
       (Default) = reg_sz:
       {7651a700-06e5-11d1-8ebd-00a0c90f26ea} = reg_sz:
       {7651a701-06e5-11d1-8ebd-00a0c90f26ea} = reg_sz:
       {7651a702-06e5-11d1-8ebd-00a0c90f26ea} = reg_sz:
       {7651a703-06e5-11d1-8ebd-00a0c90f26ea} = reg_sz:

Registry Entries for Editor Extension Options

The VS Reg Root\Editors\Editor GUID\Extensions key can contain the following values. The file name extension does not include the leading period.

Name Type Range Description
(Default) REG_SZ Unused.
<ext> REG_DWORD 0-0xffffffff Relative priority of extensions. If two or more languages share the same extension, the higher-priority language is chosen.

Additionally, the current user's default selection for an editor is stored in HKEY_Current_User\Software\Microsoft\VisualStudio\X.Y\Default Editors\ext. The GUID of the selected language service is in the Custom entry. This takes precedence for the current user.

Example

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\9.0\
  \Editors\
    {8281C572-2171-45AA-A642-7D8BC1662F1C}\
      Extensions\
       (Default) = reg_sz:
       *         = reg_dword:0x00000018
       html      = reg_dword:0x00000027
       shtm      = reg_dword:0x00000027
       shtml     = reg_dword:0x00000027

Registry Entries for Managed Package Framework Language Service Options

The following registry entries are specific to the managed package framework (MPF) language service classes. These registry entries indicate support in the language service for various IntelliSense features and for other advanced editing features.

These registry entries are accessed through the LanguagePreferences class.

Name Type Range Description
CodeSense REG_DWORD 0-1 Support for IntelliSense operations.
MatchBraces REG_DWORD 0-1 Support for matching language pairs such as braces, parentheses, and brackets.
QuickInfo REG_DWORD 0-1 Support for the IntelliSense Quick Info operation.
ShowMatchingBrace REG_DWORD 0-1 Support for displaying the matching language pair in the status bar.
MatchBracesAtCaret REG_DWORD 0-1 Support for displaying matching language pairs, typically through highlighting the two elements.
MaxErrorMessages REG_DWORD 0-n The maximum number of errors that can be displayed in the Error List window.
CodeSenseDelay REG_DWORD 0-n The number of milliseconds to delay before initiating any background parsing for an IntelliSense operation.
EnableAsyncCompletion REG_DWORD 0-1 Support for background parsing.
EnableCommenting REG_DWORD 0-1 Support for commenting out selected blocks of text, and also implies support for uncommenting selected text.
EnableFormatSelection REG_DWORD 0-1 Support for formatting text such as auto-indentation or adjusting the position of braces.
AutoOutlining REG_DWORD 0-1 Support for outlining (regions that can be collapsed).
MaxRegions REG_DWORD 0-n The maximum number of hidden regions per file.
ExampleHKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\8.0Exp\
  Languages\
    Language Services\
      XML\
        (Default)             = reg_sz:{f6819a78-a205-47b5-be1c-675b3c7f0b8e}
        MatchBraces           = reg_dword:0x00000001
        QuickInfo             = reg_dword:0x00000001
        ShowMatchingBrace     = reg_dword:0x00000001
        MatchBracesAtCaret    = reg_dword:0x00000000
        MaxErrorMessages      = reg_dword:0x00000064
        CodeSenseDelay        = reg_dword:0x000001f4
        MaxRegions            = reg_dword:0x0000000a

See also