<para>The <seecref="M:Gtk.PrintOperation.Preview"/> event utilizes this delegate:</para>
<para>Event data is passed via the <seecref="T:Gtk.PreviewArgs"/> parameter.</para>
<para>To attach a <seecref="T:Gtk.PreviewHandler"/> to an event, add the PreviewHandler instance to the event. The methods referenced by the PreviewHandler instance are invoked whenever the event is raised, until the PreviewHandler is removed from the event.</para>