You can select an element name in your code and quickly navigate to its declaration.
Open declaration will attempt to navigate to the exact declaration of the selected element. Open declaration requires your file to have the proper include paths set up to the declaration. If for any reason open declaration cannot find the declaration, it will display the following message in the status line:
For more information see Adding Include paths and symbols.
Adding Include paths and symbols
Navigate to a C or C++ element's declaration
Navigate to a C or C++ element's definition
Searching for C/C++ elements