Then you should be able to code:
- #include "thatheader.h"
-
-
//or
-
-
#include <thatheader.h>
If you use the <>, the header file must be in a folder along a predefined path. Here you need to see how your development tool lets you specify additional preprocessor include directories. I know how to do this using Visual C++.
If you use the " " format, then the header must be in the same folder as the file you are compiling. If not, the preprocessor reverts to the <> format and looks along the predefined paths.