t diagonal line passing through the reference point.</P>


<H6 CLASS="RefETitle">
MSG_VIS_RULER_CONSTRAIN_TO_VECTOR</H6>
<PRE CLASS="syntax">@message void MSG_VIS_RULER_CONSTRAIN_TO_VECTOR(
        PointDWFixed _far* point);</PRE>
<P>
This message computes the point resulting from constraining the passed point using vector constraint. This means that the mouse's constrained location will end up at a certain angle from the reference angle. This angle is determined by means of a point set up my <CODE>
MSG_VIS