package includee;

use strict;
use warnings;

use Exporter qw( import );

# I prefer to use `@EXPORT_OK`
# and list the imported things
# in the `use` statement.
our @EXPORT = qw(
   $SHAREDVARIABLE1
   @SHAREDVARIABLE2
   %SHAREDVARIABLE3
   function
);

# Using `use vars` is ok, but dated.
our $SHAREDVARIABLE1;
our @SHAREDVARIABLE2;
our %SHAREDVARIABLE3;

sub function {
  ...
}

1;  # Modules must end with a true value.

##</code><code>##

use FindBin qw( $RealBin );
use lib $RealBin;