Printing barcode stickers in an appropriate way with C# code

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C#

WinForms

I am trying to print the barcode to my Xprinter 360B with lable stickers 40*25 My problem is the barcode is not being printed on one sticker, and not even centered.

enter image description here

I am using this below code. any help would be much appriciated. This is the updated code:

 public partial class Form1 : Form
{
    FontFamily ff;
    static Font font;
    Bitmap bitmap;

    public Form1()
    {
        InitializeComponent();
    }

    protected void btnPrint_Click(object sender, EventArgs e)
    {
        System.Drawing.Printing.PrintDocument myPrintDocument1 = new System.Drawing.Printing.PrintDocument();
        PrintDialog myPrinDialog1 = new PrintDialog();
        myPrintDocument1.PrintPage += new System.Drawing.Printing.PrintPageEventHandler(PrintPage);
        myPrinDialog1.Document = myPrintDocument1;

        if (myPrinDialog1.ShowDialog() == DialogResult.OK)
        {
            myPrintDocument1.Print();
        }
    }

    private void PrintPage(object o, PrintPageEventArgs e)
    {
        int width = pictureBox1.Width;
        int height = pictureBox1.Height;
        pictureBox1.Width = 140;
        pictureBox1.Height = 60;
        Bitmap myBitmap1 = new Bitmap(pictureBox1.Width, pictureBox1.Height);
        pictureBox1.DrawToBitmap(myBitmap1, new Rectangle(0, 0, pictureBox1.Width, pictureBox1.Height));
        e.Graphics.DrawImage(myBitmap1, 0, 0);
        myBitmap1.Dispose();
        pictureBox1.Width = width;
        pictureBox1.Height = height;
    }

    [DllImport("gdi32.dll")]
    private static extern IntPtr AddFontMemResourceEx(IntPtr pbfont, uint cbfont, IntPtr pdv, [In] ref uint pcFonts);

    private void loadFont()
    {
        byte[] fontArray = fontTestDeleteWhenDone.Properties.Resources.BarcodeFont;
        int dataLength = fontTestDeleteWhenDone.Properties.Resources.BarcodeFont.Length;
        IntPtr ptrData = Marshal.AllocCoTaskMem(dataLength);
        Marshal.Copy(fontArray, 0, ptrData, dataLength);
        uint cFonts = 0;
        AddFontMemResourceEx(ptrData, (uint)fontArray.Length, IntPtr.Zero, ref cFonts);
        PrivateFontCollection pfc = new PrivateFontCollection();
        pfc.AddMemoryFont(ptrData, dataLength);
        // clear memory
        Marshal.FreeCoTaskMem(ptrData);
        ff = pfc.Families[0];
        font = new Font(ff, 60f, FontStyle.Regular);
    }
    private void allocFont(Font f, Control c, float size)
    {
        FontStyle fontStyle = FontStyle.Regular;
        c.Font = new Font(ff, 60f, fontStyle);
    }

    private void Form1_Load(object sender, EventArgs e)
    {
        loadFont();
        allocFont(font, this.txtCode, 60);
    }

    private void btn_Click(object sender, EventArgs e)
    {
        try
        {
            string barcode = txtCode.Text;

            bitmap = new Bitmap(barcode.Length * 40, 150);
            using (Graphics graphics = Graphics.FromImage(bitmap))
            {
                Font ofont = new System.Drawing.Font("BarcodeFont.ttf", 20);
                PointF point = new PointF(2f, 2f);
                SolidBrush black = new SolidBrush(Color.Black);
                SolidBrush white = new SolidBrush(Color.White);
                graphics.FillRectangle(white, 0, 0, bitmap.Width, bitmap.Height);
                allocFont(font, this.pictureBox1, 80);
                graphics.DrawString(barcode, font, black, point);
            }
            using (MemoryStream ms = new MemoryStream())
            {
                bitmap.Save(ms, ImageFormat.Png);
                pictureBox1.Image = bitmap;
                pictureBox1.Height = bitmap.Height;
                pictureBox1.Width = bitmap.Width;
            }
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message);
        }
    }
}

What I have tried:

I tried to set the custom paper size. but it didn't work
PrinterSettings ps = new PrinterSettings();
PrintDocument myPrintDocument1 = new System.Drawing.Printing.PrintDocument();
myPrintDocument1.PrinterSettings = ps;
myPrintDocument1.DefaultPageSettings.PaperSize = new PaperSize("40 x 25 mm", 40, 25);