Inlcude files in visual c++ not found (new to c++)?

How does include files work in Microsoft Visual C? For example I have:



#include ';DirOne/DirTwo/MrDo.h';



From which base directory is this? Where does it start looking for this? Why is a forward slash used and not a backslash? Can I change the directories in which VC will look (make more available?)Inlcude files in visual c++ not found (new to c++)?
The #include functionality would depend on the compiler, but generally the directory where the cpp file is located is searched.



For Visual C++ then any directory specified by the /I option is searched followed by any directory specified by the INCLUDE environment variable.



Also a forward slash is used because every other compiler does so, so even if Windows uses back slashes, Visual C++ uses forward slashes to keep compatability.Inlcude files in visual c++ not found (new to c++)?
If I'm not mistaken it usually starts wherever you save your C++ file that you are working on. So if you saved your program in the directory ';DirOne'; it would start with the ';DirOne'; directory. Check to make sure where your program is saved and you can go from there.

Good Luck :)