WinSpy++ is a Win32 programmer?s utility, which can be used to select, view and modify the properties of any window in your system. These are just a few of the features on offer.
- Powerful window selection mechanism lets you select any window in the system,
including hidden windows.
- Display and modify the styles for any window.
- View window properties (set using the SetProp API call).
- View complete child and sibling window relationships.
- View scrollbar positional information.
- View full window class information.
- Browse the complete global window hierarchy.
- Automatically extract passwords from password-edit controls!
- Multi-monitor support
http://www.catch22.net/software/winspy.asp