You can move away from using ``CClientUIInterface::MODAL``, by picking one of these (if they fit your needs):
<pre>
CClientUIInterface::MSG_INFORMATION is ICON_INFORMATION,
CClientUIInterface::MSG_WARNING is (ICON_WARNING | BTN_OK | MODAL),
CClientUIInterface::MSG_ERROR is (ICON_ERROR | BTN_OK | MODAL)
</pre>