You need to install a webserver on your computer.. use IIS, PWS, or even Apache for Win32..
Next, write a HTML form as so..
<form action="launcher.pl" method="post">
<input type="submit" name="sub" value="Run this!">
on your page..
Inside your launcher.pl CGI script (yes, you've writen a CGI script now), execute the Perl script that you want using exec or system or backticks like so..
my $q = new CGI;
my $path_to_program = "c:/perl/myprog/prog.pl";
my $return_value = system("c:/perl/bin/perl.exe",$path_to_program);
# this is the actual execution of the script.
# now you can put a message to the user
print $q->header; # send correct header, text/html
# put HTML here
It might be best if you restrict access to this script to ONLY your machine..