wn_puts -- put string (high speed)

        USAGE

          wn_puts(wn, row, col, string)
          WINDOWPTR wn;
          int row, col;
          char *string;

                wn -    window handle
                row -   row to print the string at
                col -   column to print the string at
                string- the string to print

          Row and Col are relative to the origin of the window.

          The cursor is displayed only if wn_synflg has been called with
          a value of TRUE.

        RETURNS

          TRUE or NULL if error

        CAUTIONS

          wn_puts writes the string directly to the video ram. Tabs, line
          feeds, carriage returns and other control characters are not
          filtered or processed in any way.

          Range checks are not performed to insure the specified string
          can be contained in the window.

          The window "wn" automatically becomes the top window tile upon
          return.