'langs'=>'products',// Lang file to use (without .lang) by module. File must be in langs/code_CODE/ directory.
'position'=>200,
'enabled'=>'$conf->barcode->enabled',// Define condition to show or hide menu entry. Use '$conf->mymodule->enabled' if entry must be visible if module is enabled. Use '$leftmenu==\'system\'' to show if leftmenu system is selected.