n in terms of the main view's coordinate system.</P>
<P>
The reference point, used for various types of mouse constraint, is stored in the <A NAME="Ruler_3.htm_IX_VRI_reference">
 </A>
<CODE>
VRI_reference</CODE>
 field.</P>
<P>
<CODE>
VRI_mouseMark</CODE>
<A NAME="Ruler_3.htm_IX_VRI_mouseMark">
 </A>
 contains the coordinate at which the mouse tick is currently being drawn.</P>
<P>
The <A NAME="Ruler_3.htm_IX_VRI_window">
 </A>
<CODE>
VRI_window</CODE>
 field, initiated automatically, holds the window hand