wn_color -- set window & border attribute

        USAGE

          wn_color(wn, atrib, batrib)
          WINDOWPTR wn;
          unsigned int atrib, batrib;

                wn -    window handle
                atrib - attribute to be used for the window
                batrib- attribute to be used for the border

          wn_color sets the attribute to be used for all subsequent
          operations in the window.  The attribute byte contains the
          background specific data in the upper 4 bits and the foreground
          specific data in the lower 4 bits.  Color and bit definitions
          can be found in windows.h. You can use a statement of the form:

                         atrib = (bground << 4 | fground);

          to set the attribute to the correct format.

          Attributes are defined in windows.h.

        RETURNS

          Nothing.

        CAUTIONS

          None.