Listview scroll bar - How do I know user has clicked listvie

Question

Hi,

i am creating a text box in listview item.
How I create is, I just take the location of the item and create a textbox on that location.
OnFocus over, I just take the textbox text and put it in that perticular listview item and hide
the textbox.

Now the problem is, since i am creating the textbox on a perticular location, when I scroll the lisview
the textbox remain in the same place (textbox does not get scrolled) and the data gets scrolled.

Solution what i thought is, whenver user wants to scroll or user clicks scroll bar, I
will hide the textbox.

But I could'n find the scroll bar click event. Or how do I find that user has clicked scroll bar ??

Is there any event where I can do this ??

Thanks.