Vertical tab control in winform

If you wish to have the text aligned horizontally you need to set the DrawMode to OwnerDrawFixed. Then on the DrawItem event, manually draw the control like:

private void tabControl_DrawItem(object sender, DrawItemEventArgs e)
{
    string tabName = tabControl.TabPages[e.Index].Text;
    StringFormat stringFormat = new StringFormat();
    stringFormat.Alignment = StringAlignment.Center;
    stringFormat.LineAlignment = StringAlignment.Center;
    //Find if it is selected, this one will be hightlighted...
    if (e.Index == tabControl.SelectedIndex)
        e.Graphics.FillRectangle(Brushes.LightBlue, e.Bounds);
    e.Graphics.DrawString(tabName, this.Font, Brushes.Black,        tabControl.GetTabRect(e.Index), stringFormat);
}