cygwin command to copy to windows clipboard
Cygwin comes with special device file called /dev/clipboard:
echo foobar > /dev/clipboard # Puts "foobar\n" on the clipboard
cat /dev/clipboard # Pastes clipboard to stdout
On the page you linked, there are comments hinting how to do it on windows:
On Windows, Cygwin comes with getclip and putclip which do the same job.
I second the answer above
To cat text to the Windows clipboard
putclip < foo.txt
To pipe to a file whatever text is in the Windows clipboard
getclip > foo.txt
getclip/putclip is found in cygutils-extra package.