[fpc-pascal]Missing Win32 Function

[Full_Name]

Jim,

compiling this in Delphi, I found that some stuff was a bit wrong. I didn't get 
any valid results, but then I'm on a network without a local printer.

Try the following. Straight from the Delphi unit, so may need tweaking for your 
needs. I can supply the Win32 C API version if it helps.

This is from the delphi Printers Unit, so will need de-Delphifying for FPC:

function TPrinter.GetPrinters: TStrings;
var
  LineCur, Port: PChar;
  Buffer, PrinterInfo: PChar;
  Flags, Count, NumInfo: DWORD;
  I: Integer;
  Level: Byte;
begin
  if FPrinters = nil then
  begin
    FPrinters := TStringList.Create;
    Result := FPrinters;
    try
      if Win32Platform = VER_PLATFORM_WIN32_NT then
      begin
        Flags := PRINTER_ENUM_CONNECTIONS or PRINTER_ENUM_LOCAL;
        Level := 4;
      end
      else
      begin
        Flags := PRINTER_ENUM_LOCAL;
        Level := 5;
      end;
      Count := 0;
      EnumPrinters(Flags, nil, Level, nil, 0, Count, NumInfo);
      if Count = 0 then Exit;
      GetMem(Buffer, Count);
      try
        if not EnumPrinters(Flags, nil, Level, PByte(Buffer), Count, Count, 
NumInfo) then
          Exit;
        PrinterInfo := Buffer;
        for I := 0 to NumInfo - 1 do
        begin
          if Level = 4 then
            with PPrinterInfo4(PrinterInfo)^ do
            begin
              FPrinters.AddObject(pPrinterName,
                TPrinterDevice.Create(nil, pPrinterName, nil));
              Inc(PrinterInfo, sizeof(TPrinterInfo4));
            end
          else
            with PPrinterInfo5(PrinterInfo)^ do
            begin
              LineCur := pPortName;
              Port := FetchStr(LineCur);
              while Port^ <> #0 do
              begin
                FPrinters.AddObject(Format(SDeviceOnPort, [pPrinterName, Port]),
                  TPrinterDevice.Create(nil, pPrinterName, Port));
                Port := FetchStr(LineCur);
              end;
              Inc(PrinterInfo, sizeof(TPrinterInfo5));
            end;
        end;
      finally
        FreeMem(Buffer, Count);
      end;
    except
      FPrinters.Free;
      FPrinters := nil;
      raise;
    end;
  end;
  Result := FPrinters;
end;

Hope that helps,

Matt

--

"Computer games don't affect kids; I mean if Pac-Man affected us as kids, 
we'd all be running around in darkened rooms, munching magic pills and 
listening to repetitive electronic music." 
Kristian Wilson, 
Nintendo, Inc, 1989

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