If you're working with D7, you'll want to use #type = text_format (see http://api.drupal.org/api/drupal/developer--topics--forms_api_reference.html/7#text_format) and that will give you what you want.
Otherwise, you can use check_markup() or related functions to process the text with the format.
-Randy
Anyone know how to use a specific input format for a textarea in form api? There's no property for this option.
// This is my form element:$form['easyco_custom']['easyco_custom_query'] = array(
'#type' => 'textarea',
'#title' => t(My Query'),
'#size' => 1000,
'#maxlength' => 1000,'#prefix' => '',
'#suffix' => '',
);I've created a new input_format using admin/settings/filters and I need to use it here. It's a SQL syntax highlighter(it's not about executing this sql, so no injection)Thanks in advanced