Short of getting into hooks/subclassing, why not check the
ActiveWindow.VisibleRange
ActiveWindow.Panes(1).VisibleRange

in the SelectionChange event.
Not perfect, but at least will know if the user is looking at the same area
of the WS or not.

NickHK

"sonu" wrote in message
ups.com...
How can I develop an event using class module that can detect if
current windows has been scrolled. either by using scroll bar or mouse
wheel.

I know little bit about class modules and develop a test event using
raise event and with event commands.

I read and used the article on the following link but still now sure
how to do this with scroll bar.

http://www.tushar-mehta.com/excel/vb...xl%20event.htm