Sending OSC messages to another software

I'm new to this and I think I'm having some trouble understanding the general concept of using ethernet and OSC with Arduino.

Are the Ethernet and OSC implementations solely about sending data via the board's actual pins or is it also possible to have the IDE (serial monitor?) talk to another software on the same computer?

Here's what I'd like to do (for a start):

Connect a potentiometer to an analog input/5V, send the value to SuperCollider running on the same computer via OSC and have it, let's say, control an oscillator's frequency there.

I do have the Oscuino library included.

Peace, Matze