You can select which C/C++ Indexers to use for your project. The indexer is necessary for search and related features, like content assist.
C++ Project Properties, Standard, Info
C++ Project Properties, Standard, Builders
C++ Project Properties, Standard, File Types
C++ Project Properties, Standard, Include Paths and Symbols
C++ Project Properties, Standard, Indexer
C++ Project Properties, Standard, Make Builder
C++ Project Properties, Standard, Error Parser
C++ Project Properties, Standard, Binary Parser
C++ Project Properties, Standard, Discovery Options
C++ Project Properties, Standard, Source
C++ Project Properties, Standard, Output
C++ Project Properties, Standard, Projects
C++ Project Properties, Standard, Libraries
C++ Project Properties, Standard, Path Containers
C++ Project Properties, Standard, Project References
C++ Project Properties, Managed, Info
C++ Project Properties, Managed, Builders
C++ Project Properties, Managed, C/C++ Build
C++ Project Properties, Managed, C/C++ Build, Tool Settings
C++ Project Properties, Managed, C/C++ Build, Build Settings
C++ Project Properties, Managed, C/C++ Build, Error Parsers
C++ Project Properties, Managed, C/C++ Build, Binary Parser
C++ Project Properties, Managed, File Types
C++ Project Properties, Managed, Project References