The API Spyer utility
Date: Mar 11, 2000
Author: Steve Weller
Description: This handy utility by Steve Weller lets you browse the properties of the window under the mouse cursor. You can use it to learn the window's handle, caption, class name, size, position, style, and application instance. Furthermore, you can change a few of its attributes, such as its caption, its visibility and the enabled state. On top of that, you have the complete source code, to play with and to learn from!
Click here to download the file.