/* $DOC$
   $NAME$
      ft_PChr()
   $CATEGORY$
      String
   $ONELINER$
      Convert printer control codes
   $SYNTAX$
      ft_PChr( <cString> )  ->  <cPrinterFormat>
   $ARGUMENTS$
      <cString> is the representation of the printer control codes in
      text, numeric, hexadecimal, Epson command format, or any combination
      separated by commas.
   $RETURNS$
      A character string of printer control codes.
   $DESCRIPTION$
      This function is useful for allowing the user to enter printer
      control codes in text (enclosed in double quotes), numeric,
      hexadecimal, or Epson commands preceded by a slash and returns
      the printer control code equivalent.

      NOTES"

        - Combinations of text, numbers, hex, and commands must be
           separated by commas ("A",27,&1B,/RESET).
        - Text must be enclosed in double quotes ("x").
        - Hexadecimal must be preceded by an ampersand (&1B).
        - Epson commands, listed below, must be preceded by a forward
           slash (/RESET).

        Epson commands: (slash commands are specific to the Epson)

          Job Control:

          /RESET or /INIT   Reset or initialize the printer
          /BELL  or /BEEP   Cause the printer's speaker to beep (not HS)
          /CAN              Clear print buffers (not MX)
          /SLOW             Set low speed mode (not CR, HS, MX)
          /FAST             Cancel low speed mode (not CR, HS, MX)
          /ONE              Select Unidirectional mode
          /TWO              Select Directional mode
          /ON               Activate printer
          /OFF              Turn off printer

          /FF or /EJECT     Form Feed

          Page Control:

          /1/6              Set 6 lines per inch
          /1/8              Set 8 lines per inch
          /SKIP             Set Skip perforation ON
          /SKIPOFF          Set Skip perforation OFF

          Font Selection and Manipulation:

          /ITALIC           Select italic char. set  (only FX86, EX, LX,
                                                          no LQ-1500, SX)
          /GRAPHIC          Select graphic char. set (only FX86, EX, LX,
                                                          no LQ-1500, SX)
          /ROMAN            Choose Roman font
          /SANS             Choose Sans Serif font
          /DRAFT            Choose draft
          /NLQ              Choose near letter quality
          /PICA             Choose 10 chars per inch
          /ELITE            Choose 12 chars per inch
          /COND or /SI      Choose 15 chars per inch
          /EMPH             Turn emphasize on
          /EMPHOFF          Turn emphasize off
          /SPANISH          Select spanish international char set
          /USA              Select USA international char set

   $EXAMPLES$
      SET PRINTER ON
      cSetUp := "27,116,1"
      ? ft_PChr( cSetUp )        // -> hb_BChar( 27 ) + hb_BChar( 116 ) + hb_BChar( 1 )
                                 //     <select Epson char. graphics>

      ? ft_PChr( '27,"x",0' )    // -> hb_BChar( 27 ) + hb_BChar( 120 ) + hb_BChar( 0 )
                                 //     <Epson draft mode>

      ? ft_PChr( '&1B,"E"'  )    // -> hb_BChar( 27 ) + hb_BChar( 69 )
                                 //     <HP reset>

      ? ft_PChr( "/ELITE,/NLQ" ) // -> hb_BChar( 27 ) + hb_BChar( 77 ) + ;
                                 //    hb_BChar( 27 ) + hb_BChar( 120 ) + hb_BChar( 1 )
                                 //     <Epson elite & near letter quality>
   $SEEALSO$

   $END$
 */