procedure TForm1.Button1Click(Sender: TObject);

var

 port, prnfile: file;

 buffer: array [1..128] of Char;

 Read: Integer;

begin

 // Specify a file to print

 AssignFile(prnfile, 'filetoprint');

 Reset(prnfile, 1);

 // specify printer port

 AssignFile(port, 'LPT1');

 Rewrite(port, 1);

 repeat

  BlockRead(prnfile, buffer, SizeOf(buffer), Read);

  BlockWrite(port, buffer, Read);

  // Application.ProcessMessages;

 until EOF(prnfile) or (Read <> SizeOf(buffer));

 CloseFile(prnfile);

 CloseFile(port);

end;

{

 Question:

 How do I write a raw string of a data to the printer?

 The following unit "PrtRaw.pas" demonstrates a 16/32 bit

 raw printing unit for Delphi and Borland C Builder.

 Following the unit, is an exmaple on using the

 PrtRaw unit.

 Notes:

 1) You are responsible for embedding all necessary

 control codes that the printer may require (including

 form feed codes).

 2) You must specify a valid printer and port name.

}

unit PrtRaw;

{Copyright (c) 1998 by Joe C. Hecht - All rights Reserved}

{joehecht@gte.net You may use and share this unit}

{providing my name and the copyright notice stays intact.}

interface

uses

 WinTypes;

{$IFDEF WIN32}

 type SpoolInt = DWORD;

{$ELSE}

 type SpoolInt = integer;

{$ENDIF}

function StartRawPrintJob(PrinterName : pChar;

  Port : pChar;

  DocName : pChar) : THandle;

function StartRawPrintPage(hPrn : THandle) : integer;

function PrintRawData(hPrn : THandle;

  Buffer : pointer;

  NumBytes : SpoolInt) : integer;

function EndRawPrintPage(hPrn : THandle) : integer;

function EndRawPrintJob(hPrn : THandle) : integer;



implementation

 uses

  WinProcs,

{$IFDEF WIN32}

 WinSpool;

{$ELSE}

 Print;

{$ENDIF}



function StartRawPrintJob(PrinterName : pChar;

  Port : pChar;

  DocName : pChar) : THandle;

{$IFDEF WIN32}

 var

  hPrn : THandle;

  DocInfo1 : TDocInfo1;

{$ENDIF}

begin

 {$IFDEF WIN32}

  if (OpenPrinter(PChar(PrinterName),

  hPrn,

  nil) = FALSE) then

  begin

  Result := THandle(-1);

  Exit;

  end;

  DocInfo1.pDocName := DocName;

  DocInfo1.pOutputFile := Port;

  DocInfo1.pDataType := 'RAW';

  if (StartDocPrinter(hPrn,

  1,

  @DocInfo1) = 0) then

  begin

  Result := THandle(-1);

  Exit;

  end;

  Result := hPrn;

 {$ELSE}

 result := OpenJob(Port,

  DocName,

  0);

 {$ENDIF}

end;

function StartRawPrintPage(hPrn : THandle) : integer;

begin

 {$IFDEF WIN32}

  if (StartPagePrinter(hPrn) = FALSE) then

  begin

  Result := -1;

  Exit;

  end;

  result := 1;

 {$ELSE}

 result := StartSpoolPage(hPrn);

 {$ENDIF}

end;



function PrintRawData(hPrn : THandle;

  Buffer : pointer;

  NumBytes : SpoolInt) : integer;

{$IFDEF WIN32}

var

 BytesWritten : DWORD;

 {$ENDIF}

begin

 if (NumBytes = 0) then

 begin

  Result := 1;

  Exit;

 end;

 {$IFDEF WIN32}

  if (WritePrinter(hPrn,

  Buffer,

  NumBytes,

  BytesWritten) = FALSE) then

  begin

  Result := -1;

  Exit;

  end;

  if (NumBytes <> BytesWritten) then

  begin

  Result := -1;

  Exit;

  end;

  Result := 1;

 {$ELSE}

 result := WriteSpool(hPrn,

  Buffer,

  NumBytes);

 {$ENDIF}

end;



function EndRawPrintPage(hPrn : THandle) : integer;

begin

 {$IFDEF WIN32}

  if (EndPagePrinter(hPrn) = FALSE) then

  begin

  Result := -1;

  Exit;

  end;

  Result := 1;

 {$ELSE}

 result := EndSpoolPage(hPrn);

 {$ENDIF}

end;



function EndRawPrintJob(hPrn : THandle) : integer;

begin

 {$IFDEF WIN32}

  if (EndDocPrinter(hPrn) = FALSE) then

  begin

  Result := -1;

  Exit;

  end;

  if (ClosePrinter(hPrn) = FALSE) then

  begin

  Result := -1;

  Exit;

  end;

  Result := 1;

 {$ELSE}

 result := CloseJob(hPrn);

 {$ENDIF}

end;



end.

uses

 PrtRaw;



procedure TForm1.Button1Click(Sender: TObject);

var

 hPrn : THandle;

 Data : array[0..31] of char;

begin

 hPrn := StartRawPrintJob('Generic / Text Only',

  'LPT1:',

  'My Document');

 if (integer(hPrn) < 0) then

 begin

  ShowMessage('StartRawPrintJob Failed');

  Exit;

 end;

 if (StartRawPrintPage(hPrn) < 0) then

 begin

  ShowMessage('StartRawPrintPage Failed');

  EndRawPrintJob(hPrn);

  Exit;

 end;

 Data[0] := 'P';

 Data[1] := 'a';

 Data[2] := 'g';

 Data[3] := 'e';

 Data[4] := #32;

 Data[5] := '1';

 Data[6] := #13;

 Data[7] := #10;

 if (PrintRawData(hPrn,

  @data,

  8) < 0) then

 begin

  ShowMessage('PrintRawData Failed');

  EndRawPrintPage(hPrn);

  EndRawPrintJob(hPrn);

  Exit;

 end;

 if (EndRawPrintPage(hPrn) < 0) then

 begin

  ShowMessage('EndRawPrintPage Failed');

  EndRawPrintJob(hPrn);

  Exit;

 end;

 if (StartRawPrintPage(hPrn) < 0) then

 begin

  ShowMessage('StartRawPrintPage Failed');

  EndRawPrintJob(hPrn);

  Exit;

 end;

 Data[0] := 'P';

 Data[1] := 'a';

 Data[2] := 'g';

 Data[3] := 'e';

 Data[4] := #32;

 Data[5] := '2';

 Data[6] := #13;

 Data[7] := #10;

 if (PrintRawData(hPrn,

  @data,

  8) < 0) then

  begin

  ShowMessage('PrintRawData Failed');

  EndRawPrintPage(hPrn);

  EndRawPrintJob(hPrn);

  Exit;

 end;

 if (EndRawPrintPage(hPrn) < 0) then

 begin

  ShowMessage('EndRawPrintPage Failed');

  EndRawPrintJob(hPrn);

  Exit;

 end;

 if (EndRawPrintJob(hPrn) < 0) then

 begin

  ShowMessage('EndRawPrintJob Failed');

  Exit;

 end;

end;

end.