Overlay files?

Hi,
Thansk for the replies and explanations.
But what I really need, is to compile a file which has overlay attributes.
Imagine this very very simple code in C++

#include <iostream.h>

int main()
{

	
	cout << "Hello World" << endl;
	
	return 0;
}

I want someone to add the commands and instructions that when I compile it
I can get a file with overlay properties.

Frankly,I need an example of coding that the result is an Overlay file.

So show me how you make it practically.

Thanks in advance.
Best Regards,
Android.