VC++ Directories vs. Additional Include Directories

Project->Properties->Configuration Properties->VC++ Directories:
– the setting in Options is used for all VS.
– Also can be found in VS->Tools->Options->Projects and Solutions->VC++ Directories which is added by default to all projects.
– The Include Directories corresponds to the environment variable INCLUDE.

C/C++->General->Additional Include Directories:
– the setting in Properties is used only for this project