ex_Entries<br></a>
             </small>
            </td>
          </tr>
        </tbody>
</table>

<h4><a name="Procedure">Procedure</a></h4>
<PRE>
   void wndifd_c (  SpiceCell   * a,
                    SpiceCell   * b,
                    SpiceCell   * c  ) 

</PRE>
<h4><a name="Abstract">Abstract</a></h4>
<PRE>
 
   Place the difference of two double precision windows into 
   a third window. 
 </PRE>
<h4><a name="Required_Reading">Required_Reading</a></h4>
<PRE>
 
   <a href="../req/windows.html">WI