''' <summary>
''' Adds Office annotation with chart to a PDF document.
''' </summary>
''' <param name="filePath">The PDF file path.</param>
''' <param name="annotationRectInPoint">The annotation area on PDF page in points (1/72 inch).</param>
Public Shared Sub AnnotatePdfFile(filePath As String, annotationRectInPoint As System.Drawing.RectangleF)
    ' register appearance generator for Office annotation
    Vintasoft.Imaging.Pdf.Tree.Annotations.PdfOfficeDocumentAnnotationAppearanceGenerator.Register()

    ' path to a template DOCX document with chart
    Dim templateDocDocumentPath As String = "ChartTemplate.docx"

    ' open PDF document
    Using pdfDocument As New Vintasoft.Imaging.Pdf.PdfDocument(filePath, False)
        ' get PDF document page
        Dim pdfPage As Vintasoft.Imaging.Pdf.Tree.PdfPage = pdfDocument.Pages(0)

        ' create PDF Office document annotation data
        Dim annotationData As New Vintasoft.Imaging.Pdf.Tree.Annotations.PdfOfficeDocumentAnnotation(pdfPage)
        ' set DOCX document for PDF Office document annotation data
        annotationData.SetDocumentFilename(templateDocDocumentPath)
        ' set the annotation position
        annotationData.Rectangle = annotationRectInPoint
        annotationData.UseGraphicObjectReleativeSize = True

        ' add annotation to the PDF page
        pdfPage.Annotations.Add(annotationData)

        ' fill template document with real data
        FillDocumentTemplate(annotationData)

        ' create appearance for changed annotation
        annotationData.UpdateAppearance()

        ' save changes in PDF document
        pdfDocument.SaveChanges()
    End Using
End Sub

''' <summary>
''' Fills the template DOCX document with real data.
''' </summary>
''' <param name="data">The annotation data.</param>
Private Shared Sub FillDocumentTemplate(data As Vintasoft.Imaging.Pdf.Tree.Annotations.PdfOfficeDocumentAnnotation)
    ' get DOCX document stream
    Using documentStream As System.IO.MemoryStream = data.OfficeDocument.GetAsMemoryStream()
        ' create DOCX document editor
        Using editor As New Vintasoft.Imaging.Office.OpenXml.Editor.Docx.DocxDocumentEditor(documentStream)
            ' get DOCX document body
            Dim documentBody As Vintasoft.Imaging.Office.OpenXml.Editor.OpenXmlDocumentElement = editor.Body

            ' change TITLE

            ' find title
            Dim titleText As Vintasoft.Imaging.Office.OpenXml.Editor.OpenXmlTextContent = documentBody.FindText("[TITLE]")
            ' change the title text
            titleText.Text = "Sales"
            ' highlight the title in bold
            titleText.SetTextProperties(Vintasoft.Imaging.Office.OpenXml.Editor.OpenXmlTextProperties.BoldText)


            ' change DATE

            ' find date
            Dim dateText As Vintasoft.Imaging.Office.OpenXml.Editor.OpenXmlTextContent = documentBody.FindText("[DATE]")
            ' change the date text
            dateText.Text = System.DateTime.Now.ToString("yyyy")

            ' create the date text properties
            Dim dateTextProperties As New Vintasoft.Imaging.Office.OpenXml.Editor.OpenXmlTextProperties()
            ' change the date text color
            dateTextProperties.Color = System.Drawing.Color.Blue
            ' change the date text size
            dateTextProperties.FontSize = 24

            ' change the date text properties
            dateText.SetTextProperties(dateTextProperties)


            ' change CHART

            ' create the chart data
            Dim chartData As System.Nullable(Of Double)(,) = New System.Nullable(Of Double)(,) {{55, 32, 23}, {84, 48, 33}, {72, 53, 86}, {34, 82, 11}}
            ' change the chart data
            editor.Charts(0).ChartData.SetData(chartData)


            ' create stream for changed document
            Using changedDocumentStream As New System.IO.MemoryStream()
                ' save template changes
                editor.Save(changedDocumentStream)

                ' change document stream
                data.SetDocumentStream(changedDocumentStream)
            End Using
        End Using
    End Using
End Sub

/// <summary>
/// Adds Office annotation with chart to a PDF document.
/// </summary>
/// <param name="filePath">The PDF file path.</param>
/// <param name="annotationRectInPoint">The annotation area on PDF page in points (1/72 inch).</param>
public static void AnnotatePdfFile(string filePath, System.Drawing.RectangleF annotationRectInPoint)
{
    // register appearance generator for Office annotation
    Vintasoft.Imaging.Pdf.Tree.Annotations.PdfOfficeDocumentAnnotationAppearanceGenerator.Register();

    // path to a template DOCX document with chart
    string templateDocDocumentPath = "ChartTemplate.docx";

    // open PDF document
    using (Vintasoft.Imaging.Pdf.PdfDocument pdfDocument = new Vintasoft.Imaging.Pdf.PdfDocument(filePath, false))
    {
        // get PDF document page
        Vintasoft.Imaging.Pdf.Tree.PdfPage pdfPage = pdfDocument.Pages[0];

        // create PDF Office document annotation data
        Vintasoft.Imaging.Pdf.Tree.Annotations.PdfOfficeDocumentAnnotation annotationData = 
            new Vintasoft.Imaging.Pdf.Tree.Annotations.PdfOfficeDocumentAnnotation(pdfPage);
        // set DOCX document for PDF Office document annotation data
        annotationData.SetDocumentFilename(templateDocDocumentPath);
        // set the annotation position
        annotationData.Rectangle = annotationRectInPoint;
        annotationData.UseGraphicObjectRelativeSize = true;

        // add annotation to the PDF page
        pdfPage.Annotations.Add(annotationData);

        // fill template document with real data
        FillDocumentTemplate(annotationData);

        // create appearance for changed annotation
        annotationData.UpdateAppearance();

        // save changes in PDF document
        pdfDocument.SaveChanges();
    }
}

/// <summary>
/// Fills the template DOCX document with real data.
/// </summary>
/// <param name="data">The annotation data.</param>
private static void FillDocumentTemplate(Vintasoft.Imaging.Pdf.Tree.Annotations.PdfOfficeDocumentAnnotation data)
{
    // get DOCX document stream
    using (System.IO.MemoryStream documentStream = data.OfficeDocument.GetAsMemoryStream())
    {
        // create DOCX document editor
        using (Vintasoft.Imaging.Office.OpenXml.Editor.Docx.DocxDocumentEditor editor =
            new Vintasoft.Imaging.Office.OpenXml.Editor.Docx.DocxDocumentEditor(documentStream))
        {
            // get DOCX document body
            Vintasoft.Imaging.Office.OpenXml.Editor.OpenXmlDocumentElement documentBody = editor.Body;

            // change TITLE

            // find title
            Vintasoft.Imaging.Office.OpenXml.Editor.OpenXmlTextContent titleText = documentBody.FindText("[TITLE]");
            // change the title text
            titleText.Text = "Sales";
            // highlight the title in bold
            titleText.SetTextProperties(Vintasoft.Imaging.Office.OpenXml.Editor.OpenXmlTextProperties.BoldText);


            // change DATE

            // find date
            Vintasoft.Imaging.Office.OpenXml.Editor.OpenXmlTextContent dateText = documentBody.FindText("[DATE]");
            // change the date text
            dateText.Text = System.DateTime.Now.ToString("yyyy");

            // create the date text properties
            Vintasoft.Imaging.Office.OpenXml.Editor.OpenXmlTextProperties dateTextProperties =
                new Vintasoft.Imaging.Office.OpenXml.Editor.OpenXmlTextProperties();
            // change the date text color
            dateTextProperties.Color = System.Drawing.Color.Blue;
            // change the date text size
            dateTextProperties.FontSize = 24;

            // change the date text properties
            dateText.SetTextProperties(dateTextProperties);


            // change CHART

            // create the chart data
            double?[,] chartData = new double?[,] {
             { 55, 32, 23 },
             { 84, 48, 33 },
             { 72, 53, 86 },
             { 34, 82, 11 } };
            // change the chart data
            editor.Charts[0].ChartData.SetData(chartData);


            // create stream for changed document
            using (System.IO.MemoryStream changedDocumentStream = new System.IO.MemoryStream())
            {
                // save template changes
                editor.Save(changedDocumentStream);

                // change document stream
                data.SetDocumentStream(changedDocumentStream);
            }
        }
    }
}