public FlowChatGroupCheckListBox()
 {
     items          = new List <FlowChatCheckItemModel>();
     checkedItems   = new List <FlowChatCheckItemModel>();
     DoubleBuffered = true;
     SetStyle(ControlStyles.UserPaint, true);
     SetStyle(ControlStyles.AllPaintingInWmPaint, true);
     SetStyle(ControlStyles.OptimizedDoubleBuffer, true);
     scrollBar = new FlowChatScrollBar();
 }
 public FlowChatScrollableListBox()
 {
     scrollBar = new FlowChatScrollBar();
 }