function inviteCharacter($ownerCharId, $sessionId, $invitedCharId, $charRole)
 {
     $msg = new CMessage();
     $msg->setName("IC");
     $msg->serialUint32($ownerCharId);
     $msg->serialUint32($sessionId);
     $msg->serialUint32($invitedCharId);
     $msg->serialEnum($charRole);
     return parent::sendMessage($msg);
 }