Automatically include all .cpp/.h files of a folder in a vcproj Project in Visual Studio

Is there a way to set a vcproj Project folder in order to automatically include all .cpp or .h files depending on the path of the project ?

On other words, when adding files to the folder of my project using Windows explorer, is it possible to have these new files automatically added to a vcproj Project, inside Visual Studio ? (even if I have to relaunch Visual Studio).
I do not need just to see them, but I need them to be automatically included inside the project for compiling and other operations...

The only way I see is to create a Visual Studio addin or a VB Script to do that...

Thanks, Regards