How do I chack if an element is in front or in back of another element?

[Support]

Q: Is there a function to test whether an element is in front or in
back of another element?

-----
A: Page 'Elements' are always returned in the order they are painted
(i.e. from back to front). As a result, there is no need for an
explicit function to check Z order of an element (in case you do need
to assign a Z-index to an element you can maintain a counter variable
in the Element extract loop and assign a unique value to each
element).

In case you need to find if two elements overlap, you can check for
intersection between their bounding boxes (element.GetBBox(rect1); ...
res.IntersectRect(rect1, rect2)).