Visual studio disable intellisense

Visual studio disable intellisense DEFAULT

Disable or pause default IntelliSense for C/C++

The C/C++ parser in default IntelliSense, especially in extremely large solutions and with older IDEs, may slow an IDE such that performance while editing is unacceptable. If this appears to be the case for your environment, consider disabling default IDE IntelliSense for C/C++ and relying only on the lighter parser in Visual Assist. If you use Visual Studio or older, consider preventing the parsers from running simultaneously.

If you develop with Unreal Engine 4 (UE4), following the UE4-specific documentation to disable default IntelliSense and UE4.

Note: disabling of default IntelliSense renders inoperable some features that rely on the module, including the Class View and Add Class Wizard.

Disabling or pausing of IDE IntelliSense varies by IDE. In all environments, begin by choosing Visual Assist as the source of C/C++ content in the options dialog of Visual Assist.

Then, follow steps for your IDE.

Visual Studio and newer

Disable IntelliSense for all solutions by adjusting the following two settings in the specified order, i.e. set the interval to zero before disabling the database:

IDE Tools menu -> Options -> Text Editor -> C/C++ -> Advanced -> Rescan Solution Interval = 0

IDE Tools menu -> Options -> Text Editor -> C/C++ -> Advanced -> Disable Database = True

More information is available in this poston the Visual C++ Team Blog.

Visual Studio and older

Option 1: Disable IntelliSense for a specific solution

Exit the IDE.

Delete NCB existing NCB file(s), and create two, read-only, zero-length NCB files in the base directory of your solution, and one in the %TEMP% directory.

Reply "no" when you load your solution in the IDE.

Re-enable default IntelliSense by deleting the NCB file in the solution base directory.

Option 2: Disable IntelliSense for all solutions

Exit the IDE.


Rename C:\Program Files\Microsoft Visual Studio 8\VC\vcpackages\feacp.dll


Return the DLL to its original name to re-enable default IntelliSense.

Option 3: Pause default IntelliSense parse during Visual Assist parse

Exit the IDE.

Create the registry string value "DefaultIntelliSense" in HKCU\Software\Whole Tomato\Visual Assist X\ <IDE spec> \

Set value to "Delay" to temporarily prevent default Intelllisense from parsing while Visual Assist parses.

Set value to "Disable" to prevent default Intelllisense from parsing at all. (This option differs from renaming of feacp.dll, in that setting value to "Disable" still causes the IDE to load an existing NCB.)

Note: Visual Assist ignores value of registry string value "DefaultIntelliSense" if option to "Get content from default IntelliSense" is enabled.

Related Documentation



Visual C++ IntelliSense features

IntelliSense is a name given to a set of features that make coding more convenient. IntelliSense for C++ is available for stand-alone files as well as for files that are part of a C++ project. In cross-platform projects, some IntelliSense features are available in .cpp and .c files in the shared code project, even when you are in an Android or iOS context.

This article provides an overview of C++ IntelliSense features. For information on how to configure your project for IntelliSense and how to troubleshoot problems, see Configure a C++ project for IntelliSense.

IntelliSense features in C++

IntelliSense is a name given to a set of features that make coding more convenient. Since different people have different ideas about what is convenient, virtually all of the IntelliSense features can be enabled or disabled in the Options dialog box, under Text Editor > C/C++ > Advanced. The Options dialog box is available from the Tools menu on the menu bar.

Tool Options dialog box

You can use the menu items and keyboard shortcuts shown in the following image to access IntelliSense.

IntelliSense menu

Statement completion and member list

When you start typing a keyword, type, function, variable name, or other program element that the compiler recognizes, the editor offers to complete the word for you.

For a list of the icons and their meanings, see Class View and Object Browser icons.

Visual C++ Complete Word window

The first time that you invoke member list, it only shows members that are accessible for the current context. If you press Ctrl+J after that, it shows all members regardless of accessibility. If you invoke it a third time, an even wider list of program elements is shown. You can turn off member list in the Options dialog box, under Text Editor > C/C++ > General > Auto list members.

Visual C++ Member List

Parameter help

When you type an opening brace of a function call, or angle bracket on a class template variable declaration, the editor shows a small window with the parameter types for each overload of the function or constructor. The "current" parameter—based on the cursor location—is in bold. You can turn off parameter information in the Options dialog box, under Text Editor > C/C++ > General > Parameter information.

Visual C++ Parameter Help

Quick Info

When you hover the mouse cursor over a variable, a small window appears inline that shows the type information and the header in which the type is defined. Hover over a function call to see the function's signature. You can turn off Quick Info in the Options dialog box, under Text Editor > C/C++ > Advanced > Auto Quick Info.

Visual C++ QuickInfo

Error squiggles

Squiggles under a program element (variable, keyword, brace, type name, and so on) call your attention to an error or potential error in the code. A green squiggle appears when you write a forward declaration, to remind you that you still need to write the implementation. A purple squiggle appears in a shared project when there is an error in code that is not currently active, for example when you are working in the Windows context but enter something that would be an error in an Android context. A red squiggle indicates a compiler error or warning in active code that you need to deal with.

Visual C++ error squiggles

Code colorization and fonts

The default colors and fonts can be changed in the Options dialog box, under Environment > Fonts and Colors. You can change the fonts for many UI windows here, not just the editor. The settings that are specific to C++ begin with "C++"; the other settings are for all languages.

Cross-platform IntelliSense

In a shared code project, some IntelliSense features such as squiggles are available even when you are working in an Android context. If you write some code that would result in an error in an inactive project, IntelliSense still shows squiggles, but they are in a different color than squiggles for errors in the current context.

Consider an OpenGLES Application that's configured to build for Android and iOS. The illustration shows shared code being edited. In this image, the active project is iOS.StaticLibrary:

iOS is selected as the active project.

Notice the following:

  • The branch on line 6 is grayed out to indicate an inactive region, because is not defined for the iOS project.

  • The greeting variable at line 11 is initialized with the identifier , which now has a red squiggle. This is because no identifier is defined in the currently active iOS project.

  • Line 12 has a purple squiggle on the identifier because this identifier isn't defined in the (currently) inactive Android.NativeActivity project. Even though this line compiles when iOS is the active project, it won't compile when Android is the active project. Since this is shared code, you should correct the code even though it compiles in the currently active configuration.

If you change the active project to Android, the squiggles change:

  • The branch on line 8 is grayed out to indicate an inactive region, because is defined for Android project.

  • The greeting variable at line 11 is initialized with identifier , which has a purple squiggle. This is because no identifier is defined in the currently inactive iOS project.

  • Line 12 has a red squiggle on the identifier because this identifier is not defined in the active project.

IntelliSense for stand-alone files

When you open a single file outside of any project, you still get IntelliSense. You can enable or disable particular IntelliSense features in the Options dialog box, under Text Editor > C/C++ > Advanced. To configure IntelliSense for single files that aren't part of a project, look for the IntelliSense and browsing for non-project files section.

Visual C++ single file intellisense

By default, single file IntelliSense only uses standard include directories to find header files. To add additional directories, open the shortcut menu on the Solution node, and add your directory to Debug Source Code list, as the following illustration shows:

Adding a path to a header file.

Enable or disable features

Since different people have different ideas about what is convenient, virtually all of the IntelliSense features can be enabled or disabled in the Options dialog box, under Text Editor > C/C++ > Advanced. The Options dialog box is available from the Tools menu on the menu bar.

Tool Options dialog box

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How to turn off Intellisense filtering in Visual Studio ?

In one of my previous blog posts , I provided an insight on the intellisense filtering feature in Visual Studio If you are one of those developers who don’t like this feature and instead you want to switch off the intellisense feature in Visual Studio , you can do so by following the below steps.

1. In Visual Studio , navigate to Tools -> Options and then select “Text editor” from the left sidebar.

2. Select the language that you are currently using. In this case , select “C#” and then in the content pane , uncheck the option “Show completion item filters”.


3. Click the OK button and then view the intellisense results now. You should not see the intellisense categories as shown in the screenshot.




IntelliSense is a general term for various code editing features including: code completion, parameter info, quick info, and member lists. IntelliSense features are sometimes called by other names such as "code completion", "content assist", and "code hinting."

IntelliSense demo

IntelliSense for your programming language

Visual Studio Code IntelliSense is provided for JavaScript, TypeScript, JSON, HTML, CSS, SCSS, and Less out of the box. VS Code supports word based completions for any programming language but can also be configured to have richer IntelliSense by installing a language extension.

Below are the most popular language extensions in the Marketplace. Select an extension tile below to read the description and reviews to decide which extension is best for you.

IntelliSense features

VS Code IntelliSense features are powered by a language service. A language service provides intelligent code completions based on language semantics and an analysis of your source code. If a language service knows possible completions, the IntelliSense suggestions will pop up as you type. If you continue typing characters, the list of members (variables, methods, etc.) is filtered to only include members containing your typed characters. Pressing Tab or Enter will insert the selected member.

You can trigger IntelliSense in any editor window by typing ⌃Space (Windows, Linux Ctrl+Space) or by typing a trigger character (such as the dot character (.) in JavaScript).

intellisense in package json

Tip: The suggestions widget supports CamelCase filtering, meaning you can type the letters which are upper cased in a method name to limit the suggestions. For example, "cra" will quickly bring up "createApplication".

If you prefer, you can turn off IntelliSense while you type. See Customizing IntelliSense below to learn how to disable or customize VS Code's IntelliSense features.

As provided by the language service, you can see quick info for each method by either pressing ⌃Space (Windows, Linux Ctrl+Space) or clicking the info icon. The accompanying documentation for the method will now expand to the side. The expanded documentation will stay so and will update as you navigate the list. You can close this by pressing ⌃Space (Windows, Linux Ctrl+Space) again or by clicking on the close icon.

quick info

After choosing a method you are provided with parameter info.

parameter info

When applicable, a language service will surface the underlying types in the quick info and method signatures. In the image above, you can see several types. Because JavaScript is dynamic and doesn't need or enforce types, suggests that the variable can be of any type.

Types of completions

The JavaScript code below illustrates IntelliSense completions. IntelliSense gives both inferred proposals and the global identifiers of the project. The inferred symbols are presented first, followed by the global identifiers (shown by the Word icon).

intellisense icons

VS Code IntelliSense offers different types of completions, including language server suggestions, snippets, and simple word based textual completions.

Customizing IntelliSense

You can customize your IntelliSense experience in settings and key bindings.


The settings shown below are the default settings. You can change these settings in your file as described in User and Workspace Settings.

Tab Completion

The editor supports "tab completion" which inserts the best matching completion when pressing Tab. This works regardless of the suggest widget showing or not. Also, pressing Tab after inserting a suggestions will insert the next best suggestion.

Tab Completion

By default, tab completion is disabled. Use the setting to enable it. These values exist:

  • - (default) Tab completion is disabled.
  • - Tab completion is enabled for all suggestions and repeated invocations insert the next best suggestion.
  • - Tab completion only inserts static snippets which prefix match the current line prefix.

Locality Bonus

Sorting of suggestions depends on extension information and on how well they match the current word you are typing. In addition, you can ask the editor to boost suggestions that appear closer to the cursor position, using the setting.

Sorted By Locality

In above images you can see that , , and are sorted based on the scopes in which they appear (loop, function, file).

Suggestion selection

By default, VS Code pre-selects the previously used suggestion in the suggestion list. This is very useful as you can quickly insert the same completion multiple times. If you'd like different behavior, for example, always select the top item in the suggestion list, you can use the setting.

The available values are:

  • - Always select the top list item.
  • - (default) The previously used item is selected unless a prefix (type to select) selects a different item.
  • - Select items based on previous prefixes that have completed those suggestions.

"Type to select" means that the current prefix (roughly the text left of the cursor) is used to filter and sort suggestions. When this happens and when its result differs from the result of it will be given precedence.

When using the last option, , VS Code remembers which item was selected for a specific prefix (partial text). For example, if you typed and then selected , the next time you typed , the suggestion would be pre-selected. This lets you quickly map various prefixes to different suggestions, for example -> and -> .

Snippets in suggestions

By default, VS Code shows snippets and completion proposals in one widget. You can control the behavior with the setting. To remove snippets from the suggestions widget, set the value to . If you'd like to see snippets, you can specify the order relative to suggestions; at the top (), at the bottom (), or inline ordered alphabetically (). The default is .

Key bindings

The key bindings shown below are the default key bindings. You can change these in your file as described in Key Bindings.

Note: There are many more key bindings relating to IntelliSense. Open the Default Keyboard Shortcuts (File > Preferences > Keyboard Shortcuts) and search for "suggest".


If you find IntelliSense has stopped working, the language service may not be running. Try restarting VS Code and this should solve the issue. If you are still missing IntelliSense features after installing a language extension, open an issue in the repository of the language extension.

Tip: For configuring and troubleshooting JavaScript IntelliSense, see the JavaScript documentation.

A particular language extension may not support all the VS Code IntelliSense features. Review the extension's README to find out what is supported. If you think there are issues with a language extension, you can usually find the issue repository for an extension through the VS Code Marketplace. Navigate to the extension's Details page and select the Support link.

Next steps

IntelliSense is just one of VS Code's powerful features. Read on to learn more:

  • JavaScript - Get the most out of your JavaScript development, including configuring IntelliSense.
  • Node.js - See an example of IntelliSense in action in the Node.js walkthrough.
  • Debugging - Learn how to set up debugging for your application.
  • Creating Language extensions - Learn how to create extensions that add IntelliSense for new programming languages.

Common questions

Why am I not getting any suggestions?

image of IntelliSense not working

This can be caused by a variety of reasons. First, try restarting VS Code. If the problem persists, consult the language extension's documentation. For JavaScript specific troubleshooting, please see the JavaScript language topic.

Why am I not seeing method and variable suggestions?

image of IntelliSense showing no useful suggestions

This issue is caused by missing type declaration (typings) files in JavaScript. You can check if a type declaration file package is available for a specific library by using the TypeSearch site. There is more information about this issue in the JavaScript language topic. For other languages, please consult the extension's documentation.



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