NAME: PieSlice

     USE: Draws a pieslice of a specified size and with a specified
          center point.  It uses the current color, fillstyle, and
          fillpattern. Errors are returned through GraphResult.

     DEPENDENCY:  Must first be in graphics mode.  The unit Graph
                  must also be placed in the uses section.

     SYNTAX: PieSlice(CenterX, CenterY : Integer; StAngle, EndAngle,
                      Radius : Word);