Hi,
I use the first answer, plus the deletion of the tab text.
tabControl1.Appearance = TabAppearance.FlatButtons;
tabControl1.ItemSize = new Size(0, 1);
tabControl1.SizeMode = TabSizeMode.Fixed;
foreach (TabPage tab in tabControl1.TabPages)
{
tab.Text = "";
}
After that i use a treeview to select each tab, like a "configuration form style".