C# passing values from one form to another

Question

Hi Evryone i was wondering if you can help me.

I have two forms in visual studio c# Form1 and Form2.

on each form i have a list box control.

Form1 has a button which when clicked i want to steal the values from the listbox on Form2 and populates the listbox on Form1.

Can anyone show me an easy way of doing this as i cant seem to get my head round it?

Hope this makes sense!

Thanks

Richard