Returns the SVG element located at the specified position in the SVG. The method assumes the size and location of the current element is the rectangle specified by aRect. Use the ElementAtPos method to determine which SVG element is at the specified location in the current element.
If no SVG element is found at the specified location, the function returns nil
The method searches the children first in reverse order and then the current element. This ensures the visually top-most element is found
Point to match with an element
Size and location of current SVG element
Defines the options for searching