C#

<code>the date today is : 2010/03/31.
10 days later the date will be : 2010/04/10.</code>

DateTime dateTime = DateTime.Now + 10;

public class DoubleBufferedTabControl : TabControl
{
	private System.Drawing.Bitmap buffer;
	public DoubleBufferedTabControl()
	{
		this.SetStyle(ControlStyles.UserPaint | ControlStyles.DoubleBuffer | ControlStyles.AllPaintingInWmPaint, true);
	}
	protected override void OnPaint(PaintEventArgs e)
	{
		//Todo : lettertype overnemen van form
		this.SetStyle(ControlStyles.UserPaint, false);
		base.OnPaint(e);
		System.Drawing.Rectangle o = e.ClipRectangle;
		System.Drawing.Graphics.FromImage(buffer).Clear(System.Drawing.SystemColors.Control);
		if (o.Width > 0 && o.Height > 0)
			DrawToBitmap(buffer, new System.Drawing.Rectangle(0, 0, Width, o.Height));
		e.Graphics.DrawImageUnscaled(buffer, 0, 0);
		this.SetStyle(ControlStyles.UserPaint, true);
	}

	protected override void OnResize(EventArgs e)
	{
		base.OnResize(e);
		buffer = new System.Drawing.Bitmap(Width, Height);
	}
}