private void btnOK_Click(object sender, EventArgs e)
 {
     CheckedElements.Clear();
     for (int ii = 0; ii < SystemCheckList.Items.Count; ++ii)
     {
         if (SystemCheckList.GetItemChecked(ii))
         {
             CheckedElements.Insert(allElementItems[ii]);
         }
     }
     if (CheckedElements.Size == 0)
     {
         //UIHelperFunctions.postWarning(ReportResource.invalidSystemMsg, ReportResource.selectSystemsMsg);
         this.DialogResult = DialogResult.None;
     }
     else
     {
         this.DialogResult = DialogResult.OK;
     }
 }