How to set filename when printing to “Microsoft print to PDF” in delphi

Question

I am trying to set the filename when printing to PDF. Setting (Printers.pas) Printer.Title works to default the PDF filename for most PDF printing engines (Adobe, CutePDF),

Answer 1

You can set the output path if you do printing without vcl. That means you have to use the DOCINFO structure, named TDocInfo from the WinApi.Windows unit. I've sligtly adapted the official example from Embarcadero:

procedure TForm1.Button1Click(Sender: TObject);
var
  Pd : TPrintDlg;
  DocInfo: TDocInfo;
const
  DOC_NAME = 'Stack Overflow';
  FILE_NAME = 'C:\temp\print\SO.pdf';
  MAX_PATH = 260;
begin
  Pd := default(TPrintDlg);
  Pd.lStructSize := sizeof(Pd);
  Pd.hWndOwner := Form1.Handle;
  Pd.Flags := PD_RETURNDC;
  if PrintDlg(pd) then begin
    DocInfo := Default(TDocInfo);
    DocInfo.cbSize := SizeOf(DocInfo);
    DocInfo.lpszDocName := StrAllocW(32);
    DocInfo.lpszOutput := StrAllocW(MAX_PATH);
    lStrCpynW(DocInfo.lpszDocName, DOC_NAME, Length(DOC_NAME) * sizeof(char));
    lStrCpynW(DocInfo.lpszOutput, FILE_NAME, Length(FILE_NAME) * sizeof(char));
    StartDoc(Pd.hDc, DocInfo);
    StartPage(Pd.hDc);
    TextOut(Pd.hDc, 100, 100, 'Page 1', 6);
    EndPage(Pd.hDc);
    StartPage(Pd.hDc);
    TextOut(Pd.hDc, 100, 100, 'Page 2', 6);
    EndPage(Pd.hDc);
    EndDoc(Pd.hDc);
    StrDisposeW(DocInfo.lpszDocName);
    StrDisposeW(DocInfo.lpszOutput);
  end;
end;

Setting lpszOutput enables you to set the output file name if you select "Microsoft Print To Pdf" as printer.

Answer 2

You can try.

var
  DeviceMode: THandle;
  Device, Driver, Port: array[0..80] of Char;
begin
  Printer.PrinterIndex := Printer.Printers.IndexOf('Microsoft Print to PDF');
  Printer.GetPrinter(Device, Driver, Port, DeviceMode);
  Printer.SetPrinter(Device, Driver, 'C:\Temp\Test.pdf', 0);

  Printer.BeginDoc;
  Printer.Canvas.TextOut(100, 100, 'Test');
  Printer.EndDoc;
end;