HelpPC 2.10 Quick Reference Utility Copyright 1991 David Jurgens

                            int dup( int handle )


       - prototype in io.h

       - returns a new file handle that duplicates the old handle
       - returns -1 on error

Esc or Alt-X to exit dup Home/PgUp/PgDn/End ←↑↓→
Converted to HTML in 2006 by Timo Bingmann