How to abort a print job and print to a file instead

Problem/Question/Abstract:

How to abort a print job and print to a file instead

Answer:

Print to file:

uses
  printers;

{$R *.DFM}

procedure StartPrintToFile(filename: string);
var
  CTitle: array[0..31] of Char;
  DocInfo: TDocInfo;
begin
  with Printer do
  begin
    BeginDoc;
    { Abort job just started on API level. }
    EndPage(Canvas.handle);
    Windows.AbortDoc(Canvas.handle);
    { Restart it with a print file as destination. }
    StrPLCopy(CTitle, Title, SizeOf(CTitle) - 1);
    FillChar(DocInfo, SizeOf(DocInfo), 0);
    with DocInfo do
    begin
      cbSize := SizeOf(DocInfo);
      lpszDocName := CTitle;
      lpszOutput := PChar(filename);
    end;
    StartDoc(Canvas.handle, DocInfo);
    StartPage(Canvas.handle);
  end;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  StartPrintToFile('C:\temp\temp.prn');
  try
    Printer.Canvas.TextOut(100, 100, 'Hello World.');
  finally
    Printer.endDoc;
  end;
end;