Question

For example, to have rschit process excell.exe means Perl.

Answer 1

If this is about the process remaining around in “server mode” after automation, you can just call the quit method on the application object. I edited by answer at How can I run a macro in an Excel file I open with Perl? to include that. (You know, I thought if I told you that it was an Application object, you could read the MS documentation on that object to figure out what you wanted to do. )

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However, you can kill a process in windows with taskkill.exe. You can read up by typing taskkill /? on the command line. It will handle taskkill /IM excel.exe.

But if you want a specific PID, you need to use tasklist.exe. (Type tasklist at the command prompt to see the output. Or tasklist /? for more information.)

The code below uses both:

use strict;
use warnings;
use English qw<$OS_ERROR>;
use File::Spec;

my $sys32dir = File::Spec->catfile( $ENV{SYSTEMROOT}, 'System32' );
my $tasklist_exe = File::Spec->catfile( $sys32dir, 'tasklist.exe' );
my ( $excel_line ) = grep { /^excel.exe\b/i } `$tasklist_exe`;
# $excel_line: 'EXCEL.EXE  4468 Console  1  20,968 K

# The PID is the second column
my ( undef, $pid ) = split qr{\s+}, $excel_line;

if ( my $rc = system( File::Spec->catfile( $sys32dir, 'taskkill.exe' )
   , '/PID', $pid 
   )) {
    die ( $OS_ERROR + 0 ) . ' - ' . $OS_ERROR;
}