On some flavour of *NIX you'd use a named pipe (man mknod). Possibly cygwin provides something similar for wintendo, but I'd be highly sceptical. The best solution's probably going to be to write a wrapper which runs your perl program to generate the CSV and then runs the DOS exe pointed at that tmp file.

In reply to Here's a quarter, download a real OS . . . :) by Fletch
in thread Making a perl program look like a regular file on Win32? by SmugX

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