/// <summary>
/// Sets the resource location on PDF page.
/// </summary>
/// <param name="inPdfFilename">The filename of input PDF document.</param>
/// <param name="outPdfFilename">The filename of output PDF document.</param>
/// <param name="pageIndex">Index of the PDF page.</param>
/// <param name="resourceIndex">Index of the resource on PDF page.</param>
/// <param name="newLocation">The new location in PDF page space.</param>
public static void SetResourceLocation(string inPdfFilename, string outPdfFilename, int pageIndex, int resourceIndex, System.Drawing.PointF newLocation)
{
    // open PDF document
    using (Vintasoft.Imaging.Pdf.PdfDocument document = new Vintasoft.Imaging.Pdf.PdfDocument(inPdfFilename))
    {
        // create PdfContentGraphicsFigureEditor on specified PDF page
        using (Vintasoft.Imaging.Pdf.Content.PdfContentGraphicsFigureEditor contentEditor =
            new Vintasoft.Imaging.Pdf.Content.PdfContentGraphicsFigureEditor(document.Pages[pageIndex], false))
        {
            int currentResourceIndex = 0;
            // for each graphics figure on PDF page
            foreach (Vintasoft.Imaging.Pdf.Drawing.GraphicsFigures.ContentStreamGraphicsFigure figure in contentEditor.GraphicsFigures)
            {
                // if graphics figure has resource
                if (figure.Resource != null)
                {
                    // if this is graphics figure that should be changed
                    if (currentResourceIndex == resourceIndex)
                    {
                        // get the bounding box of graphics figure
                        System.Drawing.RectangleF resourceBBox = figure.GetRegion().Bounds;
                        // create transformation that changes coordinates of object
                        Vintasoft.Imaging.AffineMatrix transform = Vintasoft.Imaging.AffineMatrix.CreateTranslation(newLocation.X - resourceBBox.X, newLocation.Y - resourceBBox.Y);
                        // apply transformation to the graphics figure
                        contentEditor.Transform(figure, transform);
                        break;
                    }

                    currentResourceIndex++;
                }
            }
            if (currentResourceIndex != resourceIndex)
                throw new System.IndexOutOfRangeException(string.Format("Resource with index {0} was not found", resourceIndex));
        }
        
        // save PDF document to a new file
        document.Save(outPdfFilename);
    }
}

''' <summary>
''' Sets the resource location on PDF page.
''' </summary>
''' <param name="inPdfFilename">The filename of input PDF document.</param>
''' <param name="outPdfFilename">The filename of output PDF document.</param>
''' <param name="pageIndex">Index of the PDF page.</param>
''' <param name="resourceIndex">Index of the resource on PDF page.</param>
''' <param name="newLocation">The new location in PDF page space.</param>
Public Shared Sub SetResourceLocation(inPdfFilename As String, outPdfFilename As String, pageIndex As Integer, resourceIndex As Integer, newLocation As System.Drawing.PointF)
    ' open PDF document
    Using document As New Vintasoft.Imaging.Pdf.PdfDocument(inPdfFilename)
        ' create PdfContentGraphicsFigureEditor on specified PDF page
        Using contentEditor As New Vintasoft.Imaging.Pdf.Content.PdfContentGraphicsFigureEditor(document.Pages(pageIndex), False)
            Dim currentResourceIndex As Integer = 0
            ' for each graphics figure on PDF page
            For Each figure As Vintasoft.Imaging.Pdf.Drawing.GraphicsFigures.ContentStreamGraphicsFigure In contentEditor.GraphicsFigures
                ' if graphics figure has resource
                If figure.Resource IsNot Nothing Then
                    ' if this is graphics figure that should be changed
                    If currentResourceIndex = resourceIndex Then
                        ' get the bounding box of graphics figure
                        Dim resourceBBox As System.Drawing.RectangleF = figure.GetRegion().Bounds
                        ' create transformation that changes coordinates of object
                        Dim transform As Vintasoft.Imaging.AffineMatrix = Vintasoft.Imaging.AffineMatrix.CreateTranslation(newLocation.X - resourceBBox.X, newLocation.Y - resourceBBox.Y)
                        ' apply transformation to the graphics figure
                        contentEditor.Transform(figure, transform)
                        Exit For
                    End If

                    currentResourceIndex += 1
                End If
            Next
            If currentResourceIndex <> resourceIndex Then
                Throw New System.IndexOutOfRangeException(String.Format("Resource with index {0} was not found", resourceIndex))
            End If
        End Using

        ' save PDF document to a new file
        document.Save(outPdfFilename)
    End Using
End Sub