dsPdf is dll that can be used to create pdf files. dsPrinter and dsReport uses dsPdf as well. It's a very simple dll that knows how to create pdf files from metafiles. That means you have to pass metafile to dsPdf.dll. Either pass a file on disk or pass memory where metafile resides. Here are examples of using dsPdf.dll.
In the zip file you can also find example of how to use dsPdf.dd in other PrintPreview components.

dsPdf is postcardware. That means if you want to get dll without demo message you must send me a postcard of the town or city you live in via snail mail. You can find my address at the Support section.

Delphi example:

function MMToPix(Value: Integer): Integer;
begin
  Result := Round((Value / 254) * Screen.PixelsPerInch);
end;

procedure TForm1.Button1Click(Sender: TObject);
var
  m: TMetaFile;
  ms: TMetafileCanvas;
  mems: TMemoryStream;

  H: THandle;
  r: Integer;
  BeginDocF: function(FileName: PChar): Integer; stdcall;
  EndDocF: function: Integer; stdcall;
  NewPageF: function: Integer; stdcall;
  PrintPageM: function(Data: Pointer; Size: Integer): Integer; stdcall;
  PrintPageF: function(FileName: PChar): Integer; stdcall;
  SetPageF: function(ps, orientation, w, h: Integer): Integer; stdcall;
begin
  m := TMetaFile.Create;

  ms := TMetafileCanvas.Create(m, Canvas.Handle);
  ms.Rectangle(MMToPix(100), MMToPix(100), MMToPix(2000), MMToPix(500));
  ms.TextOut(MMToPix(900), MMToPix(200), 'hahaha');
  ms.Free;

  mems := TMemoryStream.Create;
  m.SaveToStream(mems);
  mems.Position := 0;

  H := LoadLibrary('dspdf.dll');
  if H > 0 then
  begin
    @BeginDocF := GetProcAddress(H, 'BeginDoc');
    @EndDocF := GetProcAddress(H, 'EndDoc');
    @NewPageF := GetProcAddress(H, 'NewPage');
    @PrintPageM := GetProcAddress(H, 'PrintPageM');
    @PrintPageF := GetProcAddress(H, 'PrintPageF');
    @SetPageF := GetProcAddress(H, 'SetPage');

    BeginDocF('c:\1.pdf');
    SetPageF(2, 0, 0, 0);
    PrintPageM(mems.Memory, mems.Size);
    {
    m.SaveToFile('c:\tmp.emf');
    PrintPageF('c:\tmp.emf');
    DeleteFile('c:\tmp.emf');
    }
    EndDocF;
    FreeLibrary(H);
  end;

  mems.Free;

  m.Free;
end;

C++ example:

test.h

#if !defined (_LOBODA_H)
#define _LOBODA_H

typedef int (FAR PASCAL *fnBeginDocF) (char *FileName) ;
typedef int (FAR PASCAL *fnEndDocF) () ;
typedef int (FAR PASCAL *fnNewPageF) () ;
typedef int (FAR PASCAL *fnPrintPageM) (unsigned char *Data, int Size) ;
typedef int (FAR PASCAL *fnPrintPageF) (char *FileName) ;
typedef int (FAR PASCAL *fnSetPageF) (int ps, int orientation, int w, int h) ;

#endif // _LOBODA_H

test.cpp

#include <stdio.h>
#include <string.h>
#include <io.h>
#include <windows.h>

#include "test.h"

int main (int argc, char *argv[])
{
  if (argc != 4)
  {
    printf ("Ussage:\r\n\t%s <dll name> <metafile path> <destination pdf file>\r\n\r\n", argv[0]) ;
    return -1 ;
  }

  char szDll [MAX_PATH] ;
  char szMetafile [MAX_PATH] ;
  char szDestPDF [MAX_PATH] ;

  strncpy (szDll, argv[1], MAX_PATH) ;
  strncpy (szMetafile, argv[2], MAX_PATH) ;
  strncpy (szDestPDF, argv[3], MAX_PATH) ;

  HINSTANCE hDLL = LoadLibrary (szDll) ;

  if (!hDLL)
  {
    printf ("Error while loading library %s\r\n", szDll) ;
    return -1 ;
  }

  fnBeginDocF fBeginDocF = (fnBeginDocF) GetProcAddress (hDLL, "BeginDoc") ; ;
  fnEndDocF fEndDocF = (fnEndDocF) GetProcAddress (hDLL, "EndDoc") ;
  fnNewPageF fNewPageF = (fnNewPageF) GetProcAddress (hDLL, "NewPage") ;
  fnPrintPageM fPrintPageM = (fnPrintPageM) GetProcAddress (hDLL, "PrintPageM") ;
  fnPrintPageF fPrintPageF = (fnPrintPageF) GetProcAddress (hDLL, "PrintPageF") ;
  fnSetPageF fSetPageF = (fnSetPageF) GetProcAddress (hDLL, "SetPage") ;

  fBeginDocF (szDestPDF) ;
  fSetPageF (2, 0, 0, 0) ;
  fPrintPageF (szMetafile) ;
  fEndDocF () ;

  FreeLibrary (hDLL) ;
}

C# example:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;


namespace WindowsApplication3
{
  public partial class Form1 : Form
  {
    [DllImport("dspdf.dll")]
    public static extern unsafe int BeginDoc(byte[] FileName);
    [DllImport("dspdf.dll")]
    public static extern unsafe int EndDoc();
    [DllImport("dspdf.dll")]
    public static extern unsafe int NewPage();
    //public static extern unsafe int PrintPageM(char* FileName );
    [DllImport("dspdf.dll")]
    public static extern unsafe int PrintPageF(byte[] FileName);
    [DllImport("dspdf.dll")]
    public static extern unsafe int SetPaperParameters(int ps, int orientation, int w, int h);

  public Form1()
  {
    InitializeComponent();
  }

  private void button1_Click(object sender, EventArgs e)
  {


    byte[] buff = new byte[255];
    for(int i = 0; i < "3.pdf".Length; i++)
      buff[i] = (byte)"3.pdf"[i];
    BeginDoc(buff);
    SetPage(2, 0, 0, 0);

    byte[] buff1 = new byte[255];

    for(int i = 0; i < "c:\\1.emf".Length; i++)
      buff1[i] = (byte)"c:\\1.emf"[i];
    PrintPageF(buff1);
    EndDoc();
    }
  }
}

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