Get all Paper Bins

uses WinSpool, Printers

//

procedure GetPaperBins(sl: TStrings);
type
  TBinName      = array [0..23] of Char;
  TBinNameArray = array [1..High(Integer) div SizeOf(TBinName)] of TBinName;
  PBinnameArray = ^TBinNameArray;
  TBinArray     = array [1..High(Integer) div SizeOf(Word)] of Word;
  PBinArray     = ^TBinArray;
var
  Device, Driver, Port: array [0..255] of Char;
  hDevMode: THandle;
  i, numBinNames, numBins, temp: Integer;
  pBinNames: PBinnameArray;
  pBins: PBinArray;
begin
  Printer.PrinterIndex := -1;
  Printer.GetPrinter(Device, Driver, Port, hDevmode);
  numBinNames := WinSpool.DeviceCapabilities(Device, Port, DC_BINNAMES, nil, nil);
  numBins     := WinSpool.DeviceCapabilities(Device, Port, DC_BINS, nil, nil);
  if numBins <> numBinNames then
  begin
    raise Exception.Create('DeviceCapabilities reports different number of bins and bin names!');
  end;
  if numBinNames > 0 then
  begin
    pBins := nil;
    GetMem(pBinNames, numBinNames * SizeOf(TBinname));
    GetMem(pBins, numBins * SizeOf(Word));
    try
      WinSpool.DeviceCapabilities(Device, Port, DC_BINNAMES, PChar(pBinNames), nil);
      WinSpool.DeviceCapabilities(Device, Port, DC_BINS, PChar(pBins), nil);
      sl.Clear;
      for i := 1 to numBinNames do
      begin
        temp := pBins^[i];
        sl.addObject(pBinNames^[i], TObject(temp));
      end;
    finally
      FreeMem(pBinNames);
      if pBins <> nil then
        FreeMem(pBins);
    end;
  end;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
	GetPaperBins(Listbox1.Items);
end;