[development] Get the form for a node

I have searched a lot, but dont find the right way to do this. So what i want is to load the form for a node, the same form as if i am editing a node, something like: $node = node_load(1); $form = get_the_edit_form_for_this_node($node); I try: $node = node_load(1); $form = drupal_get_form('article_node_form', $node); But the resulting $form do not have the fields and the values for this node. Thanks for any help.