hi dummies_05,
i assume you use ms visual studio (.net). just follow this step.
1. after opening your project, go to this section: Files > New
select the files tab and choose the section C/C++ header
2. after creating your header file, place it at the same folder with your project file and then include it using syntax: #include "abc.hpp"
if you want to use c++ stl in your c++ file, you should not specify native header extension in your include code.
for example
regards,