Troubleshooting IntelliSense in C++ Projects
IntelliSense can stop working under certain conditions. Use the following steps to help determine why IntelliSense does not work for C++ projects.
To investigate IntelliSense failure in C++ projects
Make sure that the Visual C++ project contains no compilation errors.
- If the project is a Makefile project, see How to: Enable IntelliSense for Makefile Projects.
IntelliSense does not work in C++ projects under the following circumstances:
The cursor is in a code comment.
You are writing a string literal.
A syntax error appears over the cursor.
The solution consists of either the syntax for managed C++, or the earlier Managed Extensions for C++ syntax.
IntelliSense is not fully supported when you reference a header file multiple times by using the #include directive, and the meaning of that header file changes because of various macro states that are defined through the #define directive. In other words, when you include a header file several times and the header usage changes under different macro states, IntelliSense does not always work.