C#

TabControl.TabPages.RemoveAt(0)

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class AboutForm : Form
{
  Timer timer = new Timer();
  double STEP = 8 / 256.0;
  public AboutForm()
  {
    Opacity = 0;
    timer.Interval = (int)(1000 * STEP);
    timer.Tick += new EventHandler(timer_Tick);

    BackColor = Color.White;
    Size = new Size(512, 420);
    ShowInTaskbar = false;
    FormBorderStyle = FormBorderStyle.None;
    StartPosition = FormStartPosition.CenterParent;
    TransparencyKey = Color.Black;
    Image i = Image.FromStream(Assembly.GetExecutingAssembly().GetManifestResourceStream("splash.png"));

    Bitmap b = new Bitmap(i);
    b.MakeTransparent(Color.White);

    BackgroundImage = b;

    SetStyle(ControlStyles.DoubleBuffer | ControlStyles.AllPaintingInWmPaint, true);
    UpdateStyles();
  }

  protected override void OnHandleCreated(EventArgs e)
  {
    base.OnHandleCreated(e);
    timer.Start();
  }

  private void timer_Tick(object sender, EventArgs e)
  {
    if (Opacity >= 1.0)
    {
      timer.Stop();
      return;
    }

    Opacity += STEP;
    STEP *= 1 / 1.01;
  }
}

long FileSize = new FileInfo("C:\\boot.ini").Length;

Form2 f2 = new Form2();
			
f2.Show();

//shift the focus to the main form
this.Focus();