Metatrader 5 sample EAs very short?!

[nobody]

Hi guys,

Just wondering about the sample EAs in the metatrader 5 platform.  Why are their codes very short?  Like for example ExpertCrossMA's code, it contains only a few lines of code while the sample codes in the articles are so long and detailed? What does these two lines mean:    

      if(!ExtExpert.InitSignal(new CSignalCrossMA)) return(-2);

      if(!ExtExpert.InitMoney(new CMoneyFixedLot))  return(-3);

    

Can someone kindly explain it to me?  I'm just a beginner programmer and I'm trying to study sample codes as my reference.

Thanks in advance!

[Pawel Wojnarowski]

The code of EA itself is short, but check all the include files referenced in the code.