C#

this.AcceptButton = yourbutton;

System.IO.FileStream stream = new System.IO.FileStream("somefile.bmp",	System.IO.FileMode.Open, System.IO.FileAccess.Read);
byte[] buffer = new byte[stream.Length];
stream.Read(buffer, 0, (int)stream.Length);
stream.Close();

string str="";
for(int i=0;i < buffer.Length;i++)
   str += buffer[i].ToString()+ " ";

private void CreateBitmap(string text, Font font)
{
  // Create a bitmap of the width and height
  Bitmap bmp = new Bitmap(200, 80, PixelFormat.Format32bppArgb);
  Graphics g = Graphics.FromImage(bmp);
  RectangleF rect = new RectangleF(0f, 0f, 200f, 80f);
  g.FillRectangle(Brushes.White, rect);
  SizeF size = g.MessageString(text, font, rect.Size);
  StringFormat format = new StringFormat(StringFormatFlags.FitBlackBox);
  format.Alignment = StringAlignment.Center;
  format.LineAlignment = StringAlignment.Center;
  RectangleF posRect = new RectangleF(
    (rect.Width - size.Width) / 2,
    (rect.Height - size.Height / 2,
    size.Width,
    size.Height);
  g.DrawString(text, font, Brushes.Black, posRect, format);
  g.Dispose();
  // Save the bitmap
  bmp.Save("c:\file.bmp", ImageFormat.Bmp);
}