public TabPageButton(TabControl owner, int index)
{
this.owner = owner;
this.index = index;
BorderSelectColor = Color.Transparent;
EnabledBackColor = Color.White;
EnabledBackHoverColor = Color.White;
DisabledBackColor = Color.FromArgb(235, 235, 235);
DisabledBackHoverColor = Color.FromArgb(223, 238, 252);
Click += TabPageButton_Click;
}