C#

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);
	}
}

private void fcPrintDocument_PrintPage( object sender, PrintPageEventArgs e )
{
    cardDataTabPage.Focus();
    DrawPage( e.Graphics );
}

private void DrawPage( Graphics graphics )
{
    Graphics g = graphics;
    Pen boxPen = new Pen( Brushes.Black );

    int pageWidth = fcPrintDocument.DefaultPageSettings.PaperSize.Width;
    int pageHeight = fcPrintDocument.DefaultPageSettings.PaperSize.Height;

    RectangleF srcRect = cardDataTabPage.ClientRectangle;
    RectangleF destRect = new Rectangle( 0, 0, pageWidth, pageHeight );

    float scaleX = destRect.Width / 850;
    float scaleY = destRect.Height / 1100;

    for ( int i = 0; i < cardDataTabPage.Controls.Count; i++ )
    {
        if ( cardDataTabPage.Controls[i].GetType() == richTextBox1.GetType() )
        {
            RichTextBox rich = (RichTextBox)cardDataTabPage.Controls[i];
            g.DrawRectangle( boxPen, rich.Bounds );  // draws 3x5 box where card should be
            g.DrawString( rich.Text, rich.Font, Brushes.Black,
                rich.Bounds.Left * scaleX, rich.Bounds.Top * scaleY, new StringFormat() );
        }
    }
}