2D Vector bullshit

I've got 2 points (ie. X,Y vectors), and I need to find out the angle (degrees°) between them, so I can move an object which is at one of the points towards the other point.

How do I calculate the degrees plz???

>>41
I KNOW RIGHT

I also forgot the Velocity += Accel;  line but eh, I only pasted what's necessary.

So how the piss do I calculate the headingDegs?