IO::Tee won't install on Windows (or at least I'm not able to install it). However I played around with the GNU tee utility for Windows and arrived at this: 
tee |cmd.exe |tee -a tee.txt

[download]
The above accepts input from keyboard, make cmd.exe act on it and also print and append output to tee.txt.

In reply to Re^4: Both print and redirect STDOUT and STDERR by chessgui
in thread Both print and redirect STDOUT and STDERR by chessgui

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