C#

private void tabControl1_DrawItem(object sender, System.Windows.Forms.DrawItemEventArgs e)
{
      if(this.tabControl1.SelectedIndex==e.Index)
       {
	      SolidBrush b=new SolidBrush(Color.Blue);
	      e.Graphics.DrawString(tabControl1.TabPages  [e.Index].Text, e.Font, b,e.Bounds,sf);
	      e.DrawFocusRectangle();
	      b.Dispose();
	}
	else
	{
	  SolidBrush b=new SolidBrush(e.ForeColor);
	  e.Graphics.DrawString(tabControl1.TabPages[e.Index].Text, e.Font, b,e.Bounds,StringFormat.GenericDefault);
	   b.Dispose();
	}
			
}