Msg SandBox

Msg SandBox is free development tool that can be integrated into software applications by programmers. It permits end users to analyze, filter and dump messages sent by Windows to processes.

Demo tool with prerequisites

Aside from the source code, the downloaded package includes a small demo. In order to run it, you must have .NET Framework installed, since it was built with the aid of this platform.
It doesn't need anything else to run or modify Windows registry settings, however. You can even copy the files to a removable storage unit, like a USB flash drive, in order to launch it on any PC that has Microsoft's platform installed.
As for the interface, Msg SandBox opts for a standard .NET Framework form that shows all options it puts at your disposal. It can definitely be intimidating to inexperienced users, since the options are not that intuitive.

Analyze, filter and dump Windows messages

It's possible to view the ID, index number, height and width, parameters and result of each message sent by the operating system, filter messages, temporarily freeze the tool, as well as dump messages and delete dumps.
Moreover, you can filter information by any selected field, as well as look up codes on Microsoft's official documentation for more details. The screen can be cleared anytime with just one click.

Evaluation and conclusion

It had minimal impact on the computer's performance in our tests, running on a low amount of CPU and RAM. We haven't come across any stability issues, since it didn't hang, crash or indicate error dialogs. Messages were quickly displayed.
To sum it up, Msg SandBox is a utility that can be implemented into software products by developers who want to give end users the possibility to examine, filter and dump messages transmitted by Windows.