PRE>
<P>
By default, the VisRuler stores its guides in a chunk array, known as a guide array. If the ruler has no guides defined, it doesn't bother keeping this data structure around. When the first guide is created, the VisRuler will send itself this message, to which it will respond by setting up the data region.</P>
<P>
Subclasses might intercept this message if they have data structures which need initializing when the first guide is created.</P>


<H6 CLASS="RefETitle">
<A NAME="Ruler_8.htm_IX_MSG_VIS_