Sometimes, when displaying an RSForm!Pro form within a Joomla! Content article (using the Content plugin), you might want to load some content plugins like Code highlighter or Vote in the form's Thank you message.
This is not a default feature of RSForm!Pro, but it can be done using some custom scripting.
To achieve this, head to:
Components >> RSForm!Pro >> Manage Forms >> edit your form >> Properties >> PHP Scripts and add the following code in the Scripts called after form has been processed area:
$thankYouMessage = JHtml::_('content.prepare', $thankYouMessage);
You can find more info on the PHP Scripts tab here.