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  Routine:      CBL_WRITE_SCR_N_CHATTR
 
  Function:     Writes a specified character and attribute to a
                string of positions on the screen.
 
  Syntax:       CALL "CBL_WRITE_SCR_N_CHATTR" USING     screen-position
                                                        character
                                                        attribute
                                                        fill-length
                                              RETURNING status-code
 
  Parameters:   screen-position        Group item defined as:
                  row-number             PIC X COMP-X.
                  column-number          PIC X COMP-X.
                character              PIC X.
                attribute              PIC X.
                fill-length            PIC X(2) COMP-X.
                status-code            See ◄Key►
                                    -♦-