NAME: SetLineStyle

     USE: Procedure to set the line style, pattern, and thickness.
          The Graph unit declares these constants:

                 Line Styles and widths for Get/SetLineStyle
         -----------------------------------------------------------

                               SolidLn   = 0;
                               DottedLn  = 1;
                               CenterLn  = 2;
                               DashedLn  = 3;
                               UserBitLn = 4;


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

     SYNTAX: SetLineStyle(LineStyle : Word;Pattern : Word;Thickness : Word);