:MSG_GEN_SET_USABLE(VUM_NOW); 
  }
  else {
	@call TopView::MSG_GEN_SET_NOT_USABLE(VUM_NOW); 
  }
}</PRE>
<HR>
<A NAME="Ruler_6.htm"></A>


<H3 CLASS="subsectionTitle">
<A HREF="#index.htm">Ruler Object Library</A>: 4.2 <A HREF="#Ruler_4.htm">Managing Rulers</A>: 
Mouse Tracking</H3>
<P>
The ruler has the ability to show a tick mark which tracks the mouse's movement. This can be a boon to users who wish to know the mouse's precise location. </P>

<H6 CLASS="RefETitle">
<A NAME="Ruler_6.htm_IX_MSG_VIS_RULER_