[fpc-pascal] USB Printers

[Tom York]

Since you specify LPT1:, I assume you are using Windows.  Obviously the 
solution for Linux would be different than Windows.  I am not quite sure 
about FPC, but in Delphi you basically have two choices.

1) Capture the USB printer to an LPT port, then attempt assign(printer, 
'LPTx:');  (not a good solution in my opinion).

2) Open the Windows printer in RAW mode.  I've used this style of 
printing to a Eltron USB thermal printer and it worked well.  The 
procedure below is quite similar to the one I used.

Please write back and let me know if this routine works.

(Begin Procedure -- From Delphi newsgroups)
uses WinSpool;

procedure WriteRawStringToPrinter(PrinterName: String; S: String);
 var
   Handle: THandle;
   N: DWORD;
   DocInfo1: TDocInfo1;
 begin
   if not OpenPrinter(PChar(PrinterName), Handle, nil) then
     begin
      ShowMessage('error ' + IntToStr(GetLastError));
      Exit;
     end;
   with DocInfo1 do begin
     pDocName := PChar('test doc');
     pOutputFile := nil;
     pDataType := 'RAW';

   end;
   StartDocPrinter(Handle, 1, @DocInfo1);
   StartPagePrinter(Handle);
   WritePrinter(Handle, PChar(S), Length(S), N);
   EndPagePrinter(Handle);
   EndDocPrinter(Handle);
   ClosePrinter(Handle);
 end;
(End Procedure)

Tom




Roberto Gonçalves Barreiro wrote:
> I'm a delphi programmer.
> I'm printing a report using:
> assign(wPrinter,'Lpt1:')
> and it goes ok in paralel priner.
> I did assign(wPrinter,'USB001') and it did not work.
> Do you know how to print in USB printers?
> I thanks a lot if you can help me.
>