START "" "C:\Users\bla-bla\myexe.exe" "C:\Users\Glenn\Desktop\test.blt"

##</code><code>##

#my.pl
$myexe="C:/Users/bla-bla/myexe.exe";
$myfile="C:/Users/Glenn/Desktop/test.blt";
exec ('$myexe $myfile');

##</code><code>##

...
exec '""','$myexe','$myfile';