MFC Converter - SDK sample

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Note: To be able to use the samples you must install novaPDF SDK as samples work only with it. Download it here: nova PDF SDK.

The MFC Converter sample demonstrates how to convert an existing file by printing it to novaPDF using the ShellExecute function. It also demonstrates how to set different options and manage profiles.

When the application starts, it creates a few profiles and makes different settings in the profiles. Then it shows a dialog from where the user can select the active profile and change its settings using the controls from the dialog.

After that a document can be selected from the harddisk and printed to novaPDF using the ShellExecute function call.

When using this technique to convert a file to PDF, you have to take care of the fact that ShellExecute prints to the default printer. This function returns immediately and does not wait until the print is finished (it may return before the printing is actually started). Therefore you have to set the default printer to novaPDF before calling ShellExecute (using the SetDefaultPrinter method), register StartDoc (or any other Windows message) to be sure that the print job was started. In this message handler restore the default printer (with the RestoreDefaultPrinter method). This way you made sure that the default printer was restored and your document is printed to novaPDF Printer.

Source Code Snippets



  1. Declare INovaPdfOptions   variable

  //declare an   INovaPdfOptions member variable

  private :

    INovaPdfOptions   *m_novaOptions; 
  2. Register novaPDF Printer   messages

  const UINT  wm_Nova_FileSaved =   RegisterWindowMessageW( MSG_NOVAPDF2_FILESAVED );

  const UINT  wm_Nova_PrintError =   RegisterWindowMessageW( MSG_NOVAPDF2_PRINTERROR ); 
  BEGIN_MESSAGE_MAP(CnovaPrintDlg,   CDialog) 
    //... 
      ON_REGISTERED_MESSAGE(wm_Nova_FileSaved, OnNovaPDFFileSaved)

      ON_REGISTERED_MESSAGE(wm_Nova_PrintError, OnNovaPDFPrintError) 
    //... 
  END_MESSAGE_MAP() 
  3. Initialize INovaPdfOptions 
  BOOL   CnovaPrintDlg::OnInitDialog()

  { 
    //... 
    HRESULT hr =   S_OK;

    m_novaOptions = 0; 
    //create an instance of   INovaPdfOptions

    hr =   CoCreateInstance(__uuidof(NovaPdfOptions), NULL,   CLSCTX_INPROC_SERVER, __uuidof(INovaPdfOptions), (LPVOID*)   &m_novaOptions);

    if (SUCCEEDED(hr)) {

        //initialize NovaPdfOptions   and pass printer name

        // if you have an application   license for novaPDF SDK,

        // pass both the registration   name and the license key to the Initialize() function

        // hr =   m_novaOptions->Initialize(PRINTER_NAME, L"<registration name>",   L"<license key>");

        hr =   m_novaOptions->Initialize(PRINTER_NAME, L"", L"", L"");

    }

    else {

          ::MessageBoxW(NULL, L"Failed to create novaPDF COM   object",   L"novaPDF", MB_OK);

    }

    //... 
  } 
  4. Release   INovaPDFOptions

  CnovaPrintDlg::~CnovaPrintDlg()

  {

    //... 
    //delete profiles

      m_novaOptions->DeleteProfile(SMALL_SIZE_PROFILE, PROFILE_IS_PUBLIC); 
    // destroy our nova options   object

    if (m_novaOptions) {

          m_novaOptions->Release();

    }

    // uninitialize COM   libraries

      CoUninitialize(); 
    //... 
  }

  5. Set novaPDF Printer   Options 
  BOOL   CnovaPrintDlg::OnInitDialog()

  { 
    //...

    //initialize   m_novaOptions (see above)

    //... 
    // Add a profile called   "Small size". If profile L"Small size" exists this will fail

    hr =   m_novaOptions->AddProfile(SMALL_SIZE_PROFILE, PROFILE_IS_PUBLIC); 
    // Set some options to this   profile 
    // disable the "Save PDF file   as" prompt

    hr =   m_novaOptions->SetOptionLong(NOVAPDF_SAVE_PROMPT, FALSE, SMALL_SIZE_PROFILE, PROFILE_IS_PUBLIC);

    // set generated Pdf files   destination folder ("c:\")

    hr =   m_novaOptions->SetOptionString(NOVAPDF_SAVE_FOLDER, L"", SMALL_SIZE_PROFILE, PROFILE_IS_PUBLIC);

    // set output file   name

    hr =   m_novaOptions->SetOptionString(NOVAPDF_SAVE_FILE, L"PDF Converter small   size.pdf",   SMALL_SIZE_PROFILE, PROFILE_IS_PUBLIC); 
    //Set other   options

    //...

  }
  6. Start a print   job

  void CnovaPrintDlg::OnBnClickedOk()

  { 
    //... 
    HRESULT hr =   S_OK; 
    // set the active profile to   be used for printing

    hr =   m_novaOptions->SetActiveProfile(m_strProfile, PROFILE_IS_PUBLIC); 
    // register our window to   receive messages from the printer

    hr =   m_novaOptions->RegisterEventWindow((LONG) GetSafeHwnd()); 
    // set novaPDF as default   printer, so it will be used by ShellExecute

    hr =   m_novaOptions->SetDefaultPrinter(); 
    // license file for   ShellExecute

    hr =   m_novaOptions-   >LicenseShellExecuteFile(m_strFileToConvert.AllocSysString());
    // print the   document

    m_bPrintJobPending   = TRUE;

    HINSTANCE hExec =   ShellExecute(GetSafeHwnd(), L"print", m_strFileToConvert, NULL,   NULL, SW_HIDE);
    //...
  }
  7. Restore default printer   when printing finished

  LRESULT   CnovaPrintDlg::OnNovaPDFFileSaved(WPARAM wParam, LPARAM lParam)

  {

    // restore original default   printer

      m_novaOptions->UnRegisterEventWindow();

      m_novaOptions->RestoreDefaultPrinter();

    m_bPrintJobPending   = FALSE;

    return 0;

  }
  LRESULT   CnovaPrintDlg::OnNovaPDFPrintError(WPARAM wParam, LPARAM lParam)

  {

    switch(wParam){

        case ERROR_MSG_TEMP_FILE:

              MessageBox(L"Error saving temporary file   on printer server", L"novaPDF", MB_OK);

            break;

        case ERROR_MSG_LIC_INFO:

              MessageBox(L"Error reading license   information",   L"novaPDF", MB_OK);

            break;

        case ERROR_MSG_SAVE_PDF:

              MessageBox(L"Error saving PDF   file",   L"novaPDF", MB_OK);

            break;

        case ERROR_MSG_JOB_CANCELED:

              MessageBox(L"Print job was   canceled",   L"novaPDF", MB_OK);

            break;

    }

    // restore original default   printer

      m_novaOptions->UnRegisterEventWindow();

      m_novaOptions->RestoreDefaultPrinter();

    m_bPrintJobPending   = FALSE;

    return 0;

  }