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Microsoft KB Archive/37886

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How to Send Two-Character Printer Control Codes in Version 2.x

PSS ID Number: Q37886 Article last modified on 02-13-1991

2.00 2.10 2.20 MS-DOS

Summary: The following program for COBOL Versions 2.x shows how to send a two-character control code sequence to a printer. Please refer to your printer manual for a listing of the control codes for your printer.

More Information: The value sent to the printer must be the decimal equivalent of the concatenated hexadecimal number representing the sequence of control codes. ESC+E is the standard Epson printer control code sequence to turn on boldface type. In hexadecimal representation, ESC is 1B hex, and the letter E is 45 hex. When you concatenate these hexadecimal codes, you get 1B45 hex. 1B45 hex is equal to a decimal value of 6981. When using two-character control codes, you should assign this decimal value to a COMP-0 variable (an integer of two bytes) in the WORKING-STORAGE SECTION. A COMP-4 variable should be used for three-character control codes, because the three-character control sequence requires an integer of 4 bytes. The example below, plus examples for other COBOL versions, are included in an application note entitled “Cobol 1.x-4.00 Printer Control Codes,” which can be obtained from Microsoft Product Support Services. The following is a code example:

   identification division.
   program-id.    print.
  *
  * COBOL Version 2.x: sending two-character control codes to 
  *                    the printer
  *
   environment division.
   configuration section.
   special-names.
   printer is printer-device.
   input-output section.
   file-control.
   select print-file assign to printer.
  *
   data division.
   file section.
   fd  print-file
   label records omitted.
   01  print-rec pic x(80).
   01  cntl-rec     pic 9(4) usage comp-0.
   working-storage section.
  * Epson printer reset = ESC+@ = hex 1B40 = 6976 decimal 
   01 reset-code    pic 9(4)   value 6976 comp-0.
  * Epson printer boldface on = ESC+E = 1B45 hex = 6981 decimal 
   01 twochr-code   pic 9(4)   value 6981 comp-0.
   procedure division.
   only-para.  
       open output print-file.
       move "this line is not emphasized" to print-rec.
       write print-rec.
  ************************************                
  * Direct printer to print boldface *
  ************************************
  *
       write cntl-rec from reset-code before advancing 0.
       write cntl-rec from print-code before advancing 0.
  *      
       move "this line is emphasized" to print-rec.
       write print-rec.
  *
  * reset printer:
      write cntl-rec from reset-code before advancing 0.
      move "this line is not emphasized" to print-rec.
      write print-rec.
      close print-file.
      stop run.

Copyright Microsoft Corporation 1991.