WinExplorer

WinExplorer is a utility that shows all system`s windows in hierarchical display. For every window in the hierarchy, you can view its properties, like handle, class name, caption, size, position and more. You can also modify some properties, like Caption and Visible/Enabled. You can use this utility in all Win32-based operating systems: Windows 95,98,ME,NT,2000,XP.