Hi all I suspect I am not the only AutoIT beginner who is confused by how WM_NOTIFY works. I've reviewed some of the code examples on the forum, checked out the MSDN entry here http://msdn.microsoft.com/en-us/library/windows/desktop/bb775583(v=vs.85).aspx , read a further MSDN article on the use of WM_NOTIFY here http://blogs.msdn.com/b/oldnewthing/archive/2009/08/21/9877791.aspx , but still am not getting it, except (perhaps) at a conceptual level. So, at a conceptual level I think what is