Like this:

use Apache::Request;

sub handler {
  my $r = Apache::Request->new(shift);
  my $test = $r->param('test');

  # your code here...
}
[download]

The $r->param method handles both GET and POST requests, similar to using CGI.pm.

I would recommend you get a copy of The Eagle Book - this will tell you everything you need to know.

JJ