As I quickly described in http://moodle.org/mod/forum/discuss.php?d=138323 I feel the function popup_form is not working 100% fine. Let me explain. In the frame of the development of the module "newmodule", write the following code: $url = $CFG->wwwroot.'/mod/newmodule/view.php?id='.$cm->id; // where $cm is what you think it is $items = array(); $items[] = 'aa'; $items[] = 'bb'; popup_form($url, $items, 'myformid', '', get_string('choose'), 'myhelpfile', 'myhelptext', false); The output of this code will be a popup_form equipped with an help button. The helpbutton is supposed to link the file "myhelpfile.html" stored into $CFG->wwwroot.'/mod/newmodule/lang/xx_utf8/help/newmodule/ The link to that file shoulb be: $CFG->wwwroot/help.php?module=newmodule&file=issuedays.html&forcelang= but it is $CFG->wwwroot/help.php?module=moodle&file=issuedays.html&forcelang= Whether what I wrote is true, this function can't be used in this way in the frame of the development of a module!!!!