ba in code mitonid to room Subject ya Topic bezarid. bejaye ROOM_NAME esme room , bejaye YOUR_NICK esme IDton vabejaye YOUR SUBJECT MSG HERE matne delkhatono type konid
<message <message id='' to='ROOM_NAME@conference.nimbuzz.com' type='groupchat' from='YOUR_NICK@nimbuzz.com/Resource'>
<subject>YOUR SUBJECT MSG HERE</subject>
<body>/me has changed the subject to: YOUR SUBJECT MSG HERE</body>
</message>