void OnErrorRaised(CheckListBoxControlEventArgs e)
 {
     if (oError != null)
     {
         oError(e);
     }
 }
        protected override void  OnItemCheck(ItemCheckEventArgs ice)
        {
            string message = CheckSecurityPermission(GroupUniqueID);

            if (message == string.Empty)
            {
                base.OnItemCheck(ice);
            }
            else
            {
                ice.NewValue = ice.CurrentValue;
                CheckListBoxControlEventArgs cnt = new CheckListBoxControlEventArgs();
                cnt.ErrorMessage = message;
                if (oError != null)
                {
                    this.oError(cnt);
                }
            }
        }