STRAIN_TO_HORIZONTAL_AXIS(
        PointDWFixed _far* point);</PRE>
<P>
Use this message to constrain the mouse horizontally, forcing it to be in line horizontally with the reference point (the point stored in <CODE>
VRI_reference</CODE>
).</P>


<H6 CLASS="RefETitle">
<A NAME="Ruler_9.htm_IX_MSG_VIS_RULER_CONSTRAIN_TO_VERTICAL_AXIS">
 </A>
MSG_VIS_RULER_CONSTRAIN_TO_VERTICAL_AXIS</H6>
<PRE CLASS="syntax">void MSG_VIS_RULER_CONSTRAIN_TO_VERTICAL_AXIS(
        PointDWFixed _far* point);</PRE>
<P>
Use this me