The New C/C++ Project With Existing Sources wizard enables you to create a project using an existing makefile.
In the Code Assistance page, you choose how your code will be parsed to create the configuration used by the code assistance features of the IDE. Code assistance is a set of IDE features that help you navigate and edit source code. See About Editing C and C++ Source Files for more about these features.
Automatic Configuration. If the project has been built with debug information, the IDE searches for the include files and macro definitions for each compiled source file.
Manual Configuration. Lets you specify the location of include files and add macro definitions to be used by the IDE to create the configuration. The configuration will be for the entire project.