ใส่ตัวอักษรในภาพ แล้วทำให้เห็น Scroll bar ใน picture box อย่างไรครับ?

this.panel1.AutoScroll = true;
this.picBox.SizeMode = PictureBoxSizeMode.AutoSize;

private Bitmap CreateBitmapImage(string sImageText)
        {
            this.panel1.AutoScroll = true;
            this.picBox.SizeMode = PictureBoxSizeMode.AutoSize;
            SolidBrush brush = new SolidBrush(Color.FromArgb(FontColor));
            string FileName = "", FilePath;
            if (txtFileName.Text == "")
            {
                FileName = DateTime.Today.ToString("dd ") + DateTime.Today.ToString("MMMM ") + (DateTime.Today.Year + 543).ToString() + " " + DateTime.Now.ToString("HH") + DateTime.Now.ToString("mm") + DateTime.Now.ToString("ss");
            }
            else
                FileName = txtFileName.Text;
            FilePath = txtDirectoryPath.Text + "\\" + FileName + ".jpg";

            Bitmap objBmpImage = new Bitmap(txtDirectoryPath.Text + "\\background.jpg");

            int intWidth = 0;
            int intHeight = 0;

            // Create the Font object for the image text drawing.
            Font objFont = new Font(FontName, FontSize, FontStyle.Regular, GraphicsUnit.Pixel);
            switch (Fontstyle)
            {
                case "Regular": objFont = new Font(FontName, FontSize, FontStyle.Regular, GraphicsUnit.Pixel); break;
                case "Bold": objFont = new Font(FontName, FontSize, FontStyle.Bold, GraphicsUnit.Pixel); break;
                case "Italic": objFont = new Font(FontName, FontSize, FontStyle.Italic, GraphicsUnit.Pixel); break;
                case "Underline": objFont = new Font(FontName, FontSize, FontStyle.Underline, GraphicsUnit.Pixel); break;
                case "Bold, Italic": objFont = new Font(FontName, FontSize, FontStyle.Italic | FontStyle.Bold, GraphicsUnit.Pixel); break;
            }

            // Create a graphics object to measure the text's width and height.
            Graphics objGraphics = Graphics.FromImage(objBmpImage);

            // This is where the bitmap size is determined.
            intWidth = (int)objGraphics.MeasureString(sImageText, objFont).Width + 15;
            intHeight = (int)objGraphics.MeasureString(sImageText, objFont).Height + 15;

            // Create the bmpImage again with the correct size for the text and font.
            objBmpImage = new Bitmap(objBmpImage, new Size(intWidth, intHeight));

            StringFormat strFormat = new StringFormat();
            switch(Alignment)
            {
                case "Left": strFormat.Alignment = StringAlignment.Near; break;
                case "Center": strFormat.Alignment = StringAlignment.Center; break;
                case "Right": strFormat.Alignment = StringAlignment.Far; break;
                default: break;
            }
            switch (LineAlignment)
            {
                case "Top": strFormat.LineAlignment = StringAlignment.Near; break;
                case "Center": strFormat.LineAlignment = StringAlignment.Center; break;
                case "Bottom": strFormat.LineAlignment = StringAlignment.Far; break;
                default: break;
            }

            // Add the colors to the new bitmap.
            objGraphics = Graphics.FromImage(objBmpImage);

            // Set Background color
            if(rdoColorBack.Checked)
                objGraphics.Clear(Color.FromArgb(BackgroundColor));
            objGraphics.SmoothingMode = SmoothingMode.HighQuality;

            //objGraphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias; //  <-- This is the correct value to use. ClearTypeGridFit is better yet!
            objGraphics.DrawString(sImageText, objFont, brush, new RectangleF(0,0,intWidth,intHeight), strFormat /*StringFormat.GenericDefault*/);

            objGraphics.Flush();
            objBmpImage.Save(FilePath);
            return (objBmpImage);
        }