How to include header files in keil studio?

As the title says, I would like to know how to put header files in keil studio.
I want to use code that other people have created.

Hello,

Like in other systems.
If you have the file in your PC then just Drag & drop into project folder. Or create a new file with expected name and copy & paste the content inside.
Then just use

#include "myHeader.h"

anywhere you want.

BR, Jan

Is the easiest way to put the header file in the same file as main.cpp?

Sorry i do not understand, try to redefine the question.

BR, Jan

Using header files produced by others was a self-help solution.
However, I have not been able to solve the problem of how to create and use my own header files. Could you tell me where I can put my header files so that I can use them ?

Everything is up to you

BR, Jan

It is very clear with pictures.
Thank you !