It fires when form itself is resized

>I am trying to understand the purpose of this method (Resize).
>Does VFP automatically call this method when ANY object on the form is resized? Or only when the Form itself is resized?
>
>And if you resize the form (in a method of any object, e.g. a splitter), does it matter if you change positions of other object of the form in the form Resize() method or there is not difference if the change is done in the method where "positions" have been changed?