_HAS_EXCEPTIONS=1 vs _HAS_EXCEPTIONS=0

Question

Hi guys on Visual Studio Command Line, what is the difference between _HAS_EXCEPTIONS = 0 and =1. Might it be that _HAS_EXCEPTIONS is just a boolean and that is the value that it takes? Also I have read that it is for exceptions that this flag is for setting up exceptions on STL so 1 and 0 would mean that exceptions are on or off, right? Thank you Carlos.