.NCB File Extension
File TypeVisual C++ IntelliSense Database
File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.
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).