---8<---
4
      C:> ftype Perl=perl.exe "%1" %*
      C:> assoc .pl=Perl
      then
      C:> script.pl [args]

5
      C:> ftype Perl=perl.exe "%1" %*
      C:> assoc .pl=Perl
      C:> set PathExt=%PathExt%;.PL
      then
      C:> script [args]
---8<---
4 and 5 work on some Win32 operating systems with some command shells.
One major disadvantage with both is that you can't use them in pipelines
nor with file redirection. For example, none of the following will work
properly if you used method 4 or 5:

    C:> script.pl <infile
    C:> script.pl >outfile
    C:> echo y | script.pl
    C:> script.pl | more

This is due to a Win32 bug which Perl has no control over. This bug is
the major motivation for pl2bat [which was originally written for DOS]
being used on Win32 systems.