[C#] Tabcontrol by Mavamaarten

using System;
using System.Drawing;
using System.Windows.Forms;
using System.Drawing.Drawing2D;

public class DotNetBarTabcontrol : TabControl
{
    public DotNetBarTabcontrol()
    {
        SetStyle(ControlStyles.AllPaintingInWmPaint, true);
        SetStyle(ControlStyles.ResizeRedraw, true);
        SetStyle(ControlStyles.UserPaint, true);
        SetStyle(ControlStyles.DoubleBuffer, true);
        DoubleBuffered = true;
        SizeMode = TabSizeMode.Fixed;
        ItemSize = new Size(44, 136);
    }

    protected override void CreateHandle()
    {
        base.CreateHandle();
        Alignment = TabAlignment.Left;
    }

    Pen ToPen(Color color)
    {
        return new Pen(color);
    }

    Brush ToBrush(Color color)
    {
        return new SolidBrush(color);
    }

    protected override void OnPaint(PaintEventArgs e)
    {
        Bitmap B = new Bitmap(Width, Height);
        Graphics G = Graphics.FromImage(B);

        try
        {
            SelectedTab.BackColor = Color.White;
        } catch { }

        G.Clear(Color.White);
        StringFormat sf = new StringFormat();
        sf.Alignment = StringAlignment.Center;
        sf.LineAlignment = StringAlignment.Center;
        G.FillRectangle(new SolidBrush(Color.FromArgb(218, 231, 244)), new Rectangle(0, 0, (ItemSize.Height + 4), Height));
        G.DrawLine(new Pen(Color.FromArgb(170, 187, 204)), new Point((Width - 1), 0), new Point((Width - 1), (Height - 1)));
        // comment out to get rid of the borders
        G.DrawLine(new Pen(Color.FromArgb(170, 187, 204)), new Point((ItemSize.Height + 1), 0), new Point((Width - 1), 0));
        // comment out to get rid of the borders
        G.DrawLine(new Pen(Color.FromArgb(170, 187, 204)), new Point((ItemSize.Height + 3), (Height - 1)), new Point((Width - 1), (Height - 1)));
        // comment out to get rid of the borders
        G.DrawLine(new Pen(Color.FromArgb(170, 187, 204)), new Point((ItemSize.Height + 3), 0), new Point((ItemSize.Height + 3), 999));
        for (int i = 0; (i <= (TabCount - 1)); i++)
        {
            if ((i == SelectedIndex))
            {
                Rectangle x2 = new Rectangle(new Point((GetTabRect(i).Location.X - 2), (GetTabRect(i).Location.Y - 2)), new Size((GetTabRect(i).Width + 3), (GetTabRect(i).Height - 1)));
                ColorBlend myBlend = new ColorBlend();
                myBlend.Colors = new Color[] { Color.FromArgb(38, 102, 192), Color.FromArgb(71, 134, 220), Color.FromArgb(38, 102, 192) };
                myBlend.Positions = new float[] { 0.0F, 0.5F, 1.0F};
                LinearGradientBrush lgBrush = new LinearGradientBrush(x2, Color.Black, Color.Black, 90.0F);
                lgBrush.InterpolationColors = myBlend;
                G.FillRectangle(lgBrush, x2);
                G.DrawRectangle(new Pen(Color.FromArgb(12, 63, 149)), x2);
                G.SmoothingMode = SmoothingMode.HighQuality;
                Point[] p = new Point[] { new Point((ItemSize.Height - 3), (GetTabRect(i).Location.Y + 20)), new Point((ItemSize.Height + 4), (GetTabRect(i).Location.Y + 14)), new Point((ItemSize.Height + 4), (GetTabRect(i).Location.Y + 27)) };
                G.FillPolygon(Brushes.White, p);
                if (ImageList != null)
                {
                    try
                    {
                        if (ImageList.Images[TabPages[i].ImageIndex] != null)
                        {
                            G.DrawImage(ImageList.Images[TabPages[i].ImageIndex], new Point((x2.Location.X + 8), (x2.Location.Y + 6)));
                            G.DrawString(("      " + TabPages[i].Text), new Font(Font.FontFamily, Font.Size, FontStyle.Bold), Brushes.White, x2, sf);
                        }
                        else
                        {
                            G.DrawString(TabPages[i].Text, new Font(Font.FontFamily, Font.Size, FontStyle.Bold), Brushes.White, x2, sf);
                        }
                    }
                    catch
                    {
                        G.DrawString(TabPages[i].Text, new Font(Font.FontFamily, Font.Size, FontStyle.Bold), Brushes.White, x2, sf);
                    }
                }
                else
                {
                    G.DrawString(TabPages[i].Text, new Font(Font.FontFamily, Font.Size, FontStyle.Bold), Brushes.White, x2, sf);
                }
                G.DrawLine(new Pen(Color.FromArgb(200, 200, 250)), new Point((x2.Location.X - 1), (x2.Location.Y - 1)), new Point(x2.Location.X, x2.Location.Y));
                G.DrawLine(new Pen(Color.FromArgb(200, 200, 250)), new Point((x2.Location.X - 1), (x2.Bottom - 1)), new Point(x2.Location.X, x2.Bottom));
            }
            else
            {
                Rectangle x2 = new Rectangle(new Point((GetTabRect(i).Location.X - 2), (GetTabRect(i).Location.Y - 2)), new Size((GetTabRect(i).Width + 3), (GetTabRect(i).Height + 1)));
                G.FillRectangle(new SolidBrush(Color.FromArgb(218, 231, 244)), x2);
                G.DrawLine(new Pen(Color.FromArgb(170, 187, 204)), new Point(x2.Right, x2.Top), new Point(x2.Right, x2.Bottom));
                if (ImageList != null)
                {
                    try
                    {
                        if (ImageList.Images[TabPages[i].ImageIndex] != null)
                        {
                            G.DrawImage(ImageList.Images[TabPages[i].ImageIndex], new Point((x2.Location.X + 8), (x2.Location.Y + 6)));
                            G.DrawString(("      " + TabPages[i].Text), Font, Brushes.Black, x2, sf);
                        }
                        else
                        {
                            G.DrawString(TabPages[i].Text, Font, Brushes.Black, x2, sf);
                        }
                    }
                    catch
                    {
                        G.DrawString(TabPages[i].Text, Font, Brushes.Black, x2, sf);
                    }
                }
                else
                {
                    G.DrawString(TabPages[i].Text, Font, Brushes.Black, x2, sf);
                }
            }
        }
        e.Graphics.DrawImage(B, 0, 0);
        G.Dispose();
        B.Dispose();
    }
}