Facebook API: Suggest page to friends and view which are were selected -

i developing application based on user challenges. app requires facebook account play.

i want user able select bunch of friends wants challenge , send them "invitation". besides this, need find friends did user invite in order save them database , "prepare" challenge.

i managed select-friends-dialog using this, have no idea how retrieve selected users. also, work on non-canvas facebook applications? read page, not sure whether work non-canvas application.

here select-friends-dialog code:

function challengefriends(){ fb.ui({     method: 'apprequests',     message: 'message",     title: 'title' }); 

}

any highly appreciated! thank you.

i've written tutorial covers asking , other aspects of request dialog: how to: send application request using facebook graph api

the idea capture request ids callback , save them in db, , within request can find invitee id (friend id):

fb.ui({     method: 'apprequests',     message: 'check out application!',     title: 'send friends application request', }, function (response) {     if (response && response.request_ids) {         var requests = response.request_ids.join(',');         $.post('handle_requests.php',{uid: <?php echo $uid; ?>, request_ids: requests},function(resp) {         });     } else {         alert('canceled');     } });