Listview co-ordinates?

I'm trying to find the Top Left co-ordinates of a subitem in a listview control. say subitem[2]

I need this so I can overlay a textbox to create a kind of editable effect.

ok, instead what if I wanted to know how much the scroll bar has moved for a listview control.

so if the scrollbar has moved by 20, I want to capture this value when scrolling has taken place?

is that even possible?