Following from Util - Windows Handles Viewer (Simple GUI with REPL) here is nice utility that takes a screenshot of the target handle's window (when the target process doesn't use the the Win32 Windows controls, you will get a screenshot of the main Window)
You can download the 868 Kb tool from: Util - Windows Handles - View Handle Screenshot v1.0.exe
Here is the tool taking a screenshot of itself :)
Here is the source code that creates tool:
And here is the PDF with the 'how the script was created' step-by-step guide: