private void InitializeComponent()
{
tabControl = new CustomTabControl ();
tabControl.Dock = System.Windows.Forms.DockStyle.Fill;
tabControl.Appearance = System.Windows.Forms.TabAppearance.FlatButtons;
tabControl.ItemSize = new System.Drawing.Size(0, 1);
tabControl.SizeMode = System.Windows.Forms.TabSizeMode.Fixed;
tabControl.TabIndexChanged += TabControl_TabIndexChanged;
this.Text = "Chat";
this.Controls.Add (tabControl);
}