public TabPage CreateTabPage(Room room)
{
if (pages.ContainsKey (room.ID)) {
return pages [room.ID];
}
pages.Add (room.ID, new TabPage ());
TabPage page = pages[room.ID];
page.Text = "Group: " + room.ID;
ChatControl cht = new ChatControl ();
cht.Dock = DockStyle.Fill;
cht.Room = room;
page.Controls.Add (cht);
return page;
}