#!C:/Perl/bin/perl.exe -w
use strict;
use CGI;
use Data::Dumper;

my $cgi = new CGI;
my @cgi_vars = $cgi->param();

if ($#cgi_vars < 0) {
    # handle the case of no CGI parameters
    # ...
    exit(0);
}

# build a (normalized) hash of CGI variables
# with variable name converted to upper case
my %vars = map { uc($_) => $cgi->param($_) } @cgi_vars;

# debug only - display the variable hash
#print Dumper(\%vars);

# Handle the requests
if (defined $vars{DELIVERMESSAGE}) {
   # do deliver message
   # ...

} elsif (defined $vars{MESSAGECOUNT} &&
         defined $vars{BRANCH}) {
   # do message count
   # $vars{BRANCH} is the branch name
   # ...

} elsif (defined ..... ) {
   # etc. etc.
}