ategies may be combined with the default mouse constrain strategy; if the other strategy's VRCS_OVERRIDE flag is set, then the default mouse constraint strategy field will be ignored.</DD>
<DT>
VRCS_SET_REFERENCE </DT><DD>
This flag signals that the next selection should signal that the user wishes the point clicked on to be the reference point, which is used with certain kinds of mouse constraint.</DD>
<DT>
VRCS_SNAP_TO_GRID_X_ABSOLUTE </DT><DD>
This flag signals that the mouse position should be snapped t