I dont really understand your question, because i'm new too, an just create window app (not android) for learning. But i thinks, helloworld files you're asking is in folder classes (your_created_game_folder/classes). There are 4 files in the beginning AppDelegate.h/.cpp and HelloWorldScene.h/.cpp, that's is what you looking for.
If you use Visual studio on win7 just go to proj.win32 folder and open project (your_game_name.sln). After loading project, in solution explorer, expand your_game_name, then classes, you'll what you need. At this time, i still dont need to do anything with file main.h, but if you're interested, just expand win32, you'll see it. Hope this help!
P/s: pls excuse for my bad English