'AdvToolBar.hpp' file not found error when building

I am trying to build a project file created with Borland C++ Builder 6 that can be partially added to a new project in C++ Builder 10.3.

When I added three files to the project, Main.cpp, Main.h, Main.dfm, I got the following error:

[bcc32c fatal error] Main.h(13): 'AdvToolBar.hpp' file not found

This error should not be found in

#include "AdvToolBar.hpp"

Do you mean that I cannot include this file called AdvToolBar.hpp because it is not on my PC?
Please check if you have this file and let me know how to avoid the error.