Table of content

Underline Spelling Errors

Underline spelling errors as you write comments and strings, or check periodically in a batch mode. 


Right+Click or press the menu key when the caret is on a misspelled word to see a list of suggested spellings. Accept a suggestion, add the word to your user dictionary, or ignore occurrences until restart of the IDE.

Spell check in batch mode via 'VAssistX | Tools | Spell Check...', or using a button in the Visual Assist toolbar.

If there is current selection, only the selection is checked. If there is no selection, your current file is checked.


Select the color of underlining in the Visual Assist options dialog.

Ticks in Scroll Margin

Red ticks in the vertical scroll margin of the text editor identify locations of spelling errors, among other types of errors. You can show/hide the ticks via:

Tools | Options | Text Editor | C/C++ | Scroll Bars | Show annotations over vertical scroll bar | Show errors

Commented Code

Visual Assist does not underline what it believes is commented code. This includes symbols defined in any context.

Words within comments that appear in PascalCase, camelCase or hungarian_notation are not underlined. Visual Assist assumes the words refer to symbols.

Preprocessor Macros

String arguments to C/C++ preprocessor macros are not checked, e.g. string arguments to _T().

Behavior Nuances

Single-letter words are not considered misspelled.

Visual Assist waits for a pause in typing before underlining so it doesn't underline unfinished words. 

Words that contain, or are followed by, special characters such as @ and <, are assumed to be part of an email address or URL and are not underlined.

Formatting symbols such as %d and \n are not underlined.

International Support

Visual Assist installs with only a U.S. English (en_US) dictionary. Dictionaries for other languages and dialects may be downloaded and installed. Visual Assist reads dictionaries in the format supported by Mozilla Firefox.

A collection of suitable dictionaries is available via GitHub

Alternatively, for ease, if your locale is listed in the following table, download the late-2017 archive that contains your dictionary(ies). If you are unable to download a zip, download a txt version and rename the file(s).

Locale Download Download
and Rename
About the Dictionary
Croatian Hrvatski hr.txt Croatian Dictionary - Hrvatski Rječnik
Dutch Nederlands nl.txt Woordenboek Nederlands
English (Australian) en-AU.txt English (Australian) Dictionary
English (British) en-GB.txt British English Dictionary (Marco Pinto)
English (Canadian) en-CA.txt Canadian English Dictionary
French Français fr-classic.txt French spelling dictionary
German (Austria) de-AT.txt German Dictionary, extended for Austria
German (Germany) de-DE.txt German dictionary (de_DE)
German (Switzerland) de-CH.txt German dictionary (de_CH)
Hebrew עברית he.txt Hebrew spell-checking dictionary
Hindi (India) हिन्दी (भारत) hi_IN.txt Hindi Spell Checker
Italian Italiano it_IT.txt Dizionario italiano
Polish Polski pl.txt Polish Spellchecker Dictionary
Russian Русский ru.txt Russian spellchecking dictionary
Swedish Svenska
Swedish Dictionary
Ukrainian Українська uk-UA.txt Ukrainian dictionary
Vietnamese Tiếng Việt
Vietnamese Dictionary

If your locale is not listed, or you want to ensure you have the latest version of a dictionary:

  1. Using FireFox, visit the Firefox dictionaries and language packs.
  2. Select a dictionary.
  3. Right-click the "+Add to Firefox" button and copy its link location
  4. Using a browser other than Firefox, browse to the copied location. (If you use Firefox, the extension will install to the browser, not download as an archive.)
  5. Rename the extension of the downloaded archive from xpi to zip.
  6. Uncompress the archive.
  7. Copy the dic and optional aff files from the uncompressed archive to the \Dict subdirectory of the Visual Assist installation directory:
  8. Restart your IDE to make Visual Assist find the new dictionary.

Visual Assist considers a spelling correct if it appears in any installed dictionary.

User Dictionary

When you Right+Click a misspelled word, you have the option to add the misspelled word to a dictionary of user-defined words. The words are stored in plain text in UserWords.txt, in the \Dict subdirectory of the Visual Assist installation directory. You can also populate UserWords.txt with any text editor—one word per line.