Although it looks like it, Grabtxt is not properly a screen capturer, since its function is to capture the text that contains the typical windows of dialog boxes that open in Windows, and that it is impossible to copy and paste by traditional means.
In this way, Grabtxt will be extremely useful when you get an error or information message in those windows, because thanks to Grabtxt you can copy it and search the Internet for information about that message.
For the correct operation of Grabtxt you need to have previously installed the NET Framework 2.0 or higher.
You can free download Grabtxt 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.