Why use a owner window in MessageBox.Show?

Question

MessageBox.Show has forms like MessageBox.Show( ownerWindow, .... ).

What do I gain by assigning a owner window?

Answer 1

It turns out that window ownership is not transitive. In the case where you have form, spawning a form, spawning a MessageBox, The MessageBox.Show needs to use the ownerWindow parameter. The original form should be set as the owner window of the MessageBox.