System.Windows.Forms.CustomTabControl.OnSelecting C# (CSharp) Method

        protected override void OnSelecting(TabControlCancelEventArgs e)
        {
            base.OnSelecting(e);

            //	Do not allow selecting of disabled tabs
            if (e.Action == TabControlAction.Selecting && e.TabPage != null && !e.TabPage.Enabled){
                e.Cancel = true;
            }
        }