Your post was of really much help to me, thanks.

I tried open3 and almost succeeded, but, while asimptotically reaching final result, I still had no success on that way.

I gained my goal using namely IPC::Run. I was stuck several times with "Win32 limitations" described in that module, however, but finally I got it.

Finally, a program that implements quite simple thing (from unexperienced point of view), become quite complicated, but it works and hopefully does not stuck.

I can show a code, if anyone interested on what it finally looks like.