A good answer might be:

AM Radio Similar GUI Part
Tuning Knob GUI Component
Electronic Tuning Circuit Listener
Receiver Electronics Application Code

Real-world Interfaces

Non-software devices usually have user interfaces, too. They have:
  1. Components that make up the user interface.
    • Knobs, buttons, switches
  2. Parts that are connected to the interface components.
    • These "translate" the user action into something the rest of the device can act on.
  3. The part of the device that does the actual work.
For example, the steering mechanism of a car:
  1. Components that make up the user interface.
    • Steering Wheel
  2. Parts that are connected to the interface components.
    • The shaft that connects the steering wheel to the steering gear.
  3. The part of the device that does the actual work.
    • The rest of the steering mechanism.
The "steering interface" translates the driver's actions with the steering wheel into actions of the actual steering mechanism.

QUESTION 4:

(Thought question: ) What is the one graphical component that (nearly) all GUI programs must have? Click here for a:  

Click Here after you have answered the question