.NCB File Extension
File TypeVisual C++ IntelliSense Database
What is an NCB file?
Symbols file used by Visual C++, a component of Microsoft's Visual Studio development software; contains information about different symbols used in a C++ software project, such as user-defined classes.
NCB files are used by IntelliSense, a Visual Studio component that intelligently provides recommendations while developing source code (i.e., code autocompletion).