Get Supported Paper Formats

uses Printers, WinSpool

//

procedure GetPapernames(sl: TStrings);
type
  TPaperName      = array [0..63] of Char;
  TPaperNameArray = array [1..High(Word) div SizeOf(TPaperName)] of TPaperName;
  PPapernameArray = ^TPaperNameArray;
var
  Device, Driver, Port: array [0..255] of Char;
  hDevMode: THandle;
  i, numPaperformats: Integer;
  pPaperFormats: PPapernameArray;
begin
  Printer.PrinterIndex := -1; // Standard printer
  Printer.GetPrinter(Device, Driver, Port, hDevmode);
  numPaperformats := WinSpool.DeviceCapabilities(Device,
                                                 Port,
                                                 DC_PAPERNAMES,
                                                 nil,
                                                 nil);

  if numPaperformats = 0 then
  begin
    GetMem(pPaperformats, numPaperformats * SizeOf(TPapername));
    try
      WinSpool.DeviceCapabilities(Device,
                                  Port,
                                  DC_PAPERNAMES,
                                  PChar(pPaperFormats),
                                  nil);

      sl.Clear;
      for i := 1 to numPaperformats do sl.Add(pPaperformats^[i]);
    finally
      FreeMem(pPaperformats);
    end;
  end;
end;


procedure TForm1.Button1Click(Sender: TObject);
begin
  GetPapernames(Memo1.Lines);
end;