Bitmap bmp = new Bitmap("ThomasCook.bmp");

            // Create a memory stream and save the bitmap to it

            Stream st = new MemoryStream();

            bmp.Save(st, System.Drawing.Imaging.ImageFormat.Bmp);

            // Convert the stream to a byte[] so we can use it with AddImageFromString

            st.Position = 0;

            byte[] Buffer = new byte[st.Length];

            st.Read(Buffer, 0, (int)st.Length);

            st.Dispose();

            int id = QP.AddImageFromString(Buffer, 0);

            QP.SelectImage(id);

            QP.SetOrigin(1);

            int dpix = QP.ImageHorizontalResolution();

            int dpiy = QP.ImageVerticalResolution();

            if (dpix == 0) dpix = 96;

            if (dpiy == 0) dpiy = 96;

            int xx = QP.ImageWidth();

            int yy = QP.ImageHeight();

            double ImageWidthInPoints = (double)QP.ImageWidth() / dpix * 72.0; // assumming dpi units

            double ImageHeightInPoints = (double)QP.ImageHeight() / dpiy * 72.0;

            QP.DrawImage(0, 0, ImageWidthInPoints, ImageHeightInPoints);

            Buffer = null;

            GC.Collect();

            QP.SaveToFile("out.pdf");