Hi,

Are you new to Arduino?

Cpp files are fully supported. Libraries should be on the project menu. The product has changed since the AS6.2 version so documentation will be misleading.

Okay thanks.

Arduino supports cpp/c/h files. You can add them to the project in As6.2 and also in As7. You then need to #include them into the project_name.ino

AS7 it incorrectly adds a main.cpp. It is not valid for Arduino because the arduino core defines a main.cpp in the background.

You can add cpp/h files to an arduino project by right click the project name in the "solution explorer > add new > cpp and header" or you can use any of the standard atmel windows to add files to a project.

Hope this makes sense

ps: atmel studio 7 confuses the arduino development which is why Visual Studio 2015 community is recommended. It is also free.

I just fixed a bug and it reminded me of something that might be useful. 

In visual micro (latest release) and the arduino ide you can add a cpp file to the project called "project_name.cpp"

Doing so causes the code in the .ino file(s) to be ignored and you should ensure that the cpp code has void setup() and void loop(). 

Other than the setup() and loop() methods, the cpp will work exactly like a normal .cpp but will be the main program code.