view window's size changes for any reason.</LI>
<LI>
<CODE>
MSG_META_CONTENT_VIEW_SCALE_FACTOR_CHANGED<BR>
</CODE>
This message is passed whenever the view's scale factor is changed, usually due to the user setting it from a menu.</LI>
<LI>
<CODE>
MSG_META_CONTENT_VIEW_ORIGIN_CHANGED<BR>
</CODE>
This message is passed whenever the view's origin is changed, usually when the view is scrolled.</LI>
<LI>
<CODE>
MSG_META_EXPOSED<BR>
</CODE>
This message is passed to the content whenever a portion of the view win