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Applies to: 
Visual Studio 
Visual Studio for Mac
Note
This article applies to Visual Studio 2017. If you're looking for the latest Visual Studio documentation, see Visual Studio documentation. We recommend upgrading to the latest version of Visual Studio. Download it here
Spy ++ displays tree views of the windows, messages, processes, and threads available on your machine.
In This Section
Windows View Displays a tree view of the available windows and controls.
Messages View Displays the message stream associated with a window, process, or thread.
Processes View Displays a tree view of active processes.
Threads View Displays a tree view of active threads.
Related Sections
Search Tools for Spy++ Views Dialog boxes used to find specific nodes in Spy++ Views windows.
Using Spy++ Introduces the Spy++ tool and explains how it can be used.
Spy++ Reference Includes sections describing each Spy++ menu and dialog box.