There is nothing special about passing params to Perl. You build your form in HTML, with the action attribute of the <form> tag pointing to the Perl CGI. Then, you use CGI to pull those parameters once the CGI has been called. Example:

use CGI qw(:standard);

my $param1 = param('param1');
my $param2 = param('param2');
my $param3 = param('param3');
[download]

And so on.

See also: Ovid's CGI course (external link).

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I wanted to explore how Perl's closures can be manipulated, and ended up creating an object system by accident.
-- Schemer

Note: All code is untested, unless otherwise stated