Assuming you installed it in C:\Program Files\XVI32\

use strict;
use warnings;

my @args = ("C:\\Program Files\\XVI32\\XVI32.exe", "argu1", "argu2");

system(@args) == 0
    or die "system @args failed: $?"
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You can supply arguments to open a specific file or even supply a script with the /S flag, see xvi32, section "Running scripts automatically from the command line" for details.

Cheers,

Harry