Editfields - Scrolling event and Vertical scroll in pixels?

It's been too long since I delved into the nitty gritty of the
editfield, so hopefully someone can shortcut my research.

Is there a way of getting the current vertical scroll offset in pixels
of an edit field.

editfield.ScrollPosition returns the "index of the topmost visible
line" (while editField.ScrollPositionX returns " position X pixels
from the left edge of the EditField")

Secondly, is there any direct way of getting an event when an edit
field scroll position changes? Thoughts on how to detect when an
editfield scroll positon is changing?

thanks in advance

john