getItem is a Method that allows the user to get the pointer of your Item.
For the InputArguments, Device Name is required, you can image the Device Name is your Station Name,Robot Name..etc.. And Item ID is the OutputArguments that return the Pointer of that Device.
In this Example, I received the Item ID (Pointer) of my ABB Robot that is named as “ABB_RB1”.
0 is returned if the Item Name is invalid or does not exist inside your station.