program GeneratingInMemory;

{$APPTYPE CONSOLE}

uses

SysUtils, Graphics, Classes, HPDFDoc;

var

  HPDF: THotPDF;

  MemStream: TMemoryStream;

  OutputStream: TFileStream;

begin

  HPDF:= THotPDF.Create(nil);

  try

      MemStream := TMemoryStream.Create;            // Create memory stream

      try

          HPDF.OutputStream := MemStream;           // Set output stream

          HPDF.Compression := cmFlateDecode;        // Set flate compression

          HPDF.BeginDoc;                                          // Start PDF generation

          HPDF.CurrentPage.TextOut(10, 10, 0, 'Hello World!'); // Write text on the page

          HPDF.EndDoc;                                            // Finalize the PDF in memory

          MemStream.Position := 0;                 // Rewind before copying to a file stream

          OutputStream := TFileStream.Create( 'Memory.pdf', fmCreate ) ;  // Create output filestream

          try

              OutputStream.CopyFrom( MemStream, MemStream.Size );           // Copy the generated PDF from memory

          finally

              OutputStream.Free;                                            // Close output filestream

          end;

      finally

          MemStream.Free;                            // Release the memory stream

      end;

  finally

      HPDF.Free;

  end;

end.