MFC Converter

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

The same approach should be taken if you print using a "Print()" method from another object (like an internet browser or a report control). Just replace the ShellExecute call with the call of your Print method.

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 Printer 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 Printer before calling ShellExecute (using the SetDefaultPrinter method), register FileSaved message (or any other novaPDF Printer 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;

}