WinSpy++ is a handy programmer's utility which can be used to select and view the properties of any window in the system. WinSpy is based around the Spy++ utility that ships with Microsoft Visual Studio.
WinSpy++ can obtain the following window properties:
* Window Class and Name.
* Window procedure address.
* All window styles and extended styles.
* Window properties (set using the SetProp API call).
* Complete Child and Sibling window relationships.
* Scrollbar positional information.
* Full window Class information.
http://www.catch22.net/software/winspy.asp
