Return an object from a popup window

Question

I have a Window which pop-ups another Window. I want the second Window to be able to return an object to the first Window when a button is pressed. How would I do this?

Answer 1

You can simply call any method of the popup window like this:

int value = 0;
if ((bool)poupWindow.ShowDialog() == true) {
  value = poupWindow.GetValue();
}