BCB-DG's Blog

1:
tabControl1.DrawMode = System.Windows.Forms.TabDrawMode.OwnerDrawFixed;
tabControl1.DrawItem += new DrawItemEventHandler(this.tabControl1_DrawItem);

2:
private void tabControl1_DrawItem(object sender, System.Windows.Forms.DrawItemEventArgs e)
{
    Font fntTab;
    Brush bshBack;
    Brush bshFore;
    if ( e.Index == this.tabControl1.SelectedIndex)
    {
        fntTab = new Font(e.Font, FontStyle.Bold);
        bshBack = new System.Drawing.Drawing2D.LinearGradientBrush(e.Bounds, SystemColors.Control, SystemColors.Control, System.Drawing.Drawing2D.LinearGradientMode.BackwardDiagonal);
        bshFore = Brushes.Black;
    }
    else
    {
        fntTab = e.Font;
        bshBack = new SolidBrush(Color.Blue);
        bshFore = new SolidBrush(Color.Black);
    }
    string tabName = tabControl1.TabPages[e.Index].Text;
    StringFormat sftTab = new StringFormat();
    e.Graphics.FillRectangle(bshBack, e.Bounds);
    Rectangle recTab = e.Bounds;
    recTab = new Rectangle(recTab.X, recTab.Y + 4, recTab.Width, recTab.Height - 4);
    e.Graphics.DrawString(tabName, fntTab, bshFore, recTab, sftTab);
}


public Form1()
{
    InitializeComponent();
    tabControl1.DrawMode = System.Windows.Forms.TabDrawMode.OwnerDrawFixed;
    tabControl1.DrawItem += new DrawItemEventHandler(this.tabControl1_DrawItem);
}

private void tabControl1_DrawItem(object sender, System.Windows.Forms.DrawItemEventArgs e)
{    
    Brush bshFore;
    Brush bshBack = new System.Drawing.Drawing2D.LinearGradientBrush(e.Bounds, SystemColors.Control, SystemColors.Control, System.Drawing.Drawing2D.LinearGradientMode.BackwardDiagonal);
    if (e.Index == tabControl1.SelectedIndex)
        bshFore = Brushes.Red;
    else
        bshFore = Brushes.Black;
    string tabName = tabControl1.TabPages[e.Index].Text;
    StringFormat sftTab = new StringFormat();
    e.Graphics.FillRectangle(bshBack, e.Bounds);
    Rectangle recTab = e.Bounds;
    recTab = new Rectangle(recTab.X, recTab.Y + 4, recTab.Width, recTab.Height - 4);
    e.Graphics.DrawString(tabName, e.Font, bshFore, recTab, sftTab);
}