Hi,

You do need one .ino with the same name as the project and in a folder of the same name. That will be considered an Arduino compatible project.

The .ino should contain at least two methods:-

void setup(){} 
void loop(){}

The setup will be called once when the Arduino starts and the loop(){} will be called continually.

If you make use of any Arduino libraries they should be #included in the .ino so that intellisense will work. 

Other than that you can use cpp/h files in the normal way. #include a .h in the .ino so that you can jump from the loop or setup into your own code.

Do not create a cpp file with the same name as the project.

Hope this helps.