private void toolTipController1_GetActiveObjectInfo(object sender, DevExpress.Utils.ToolTipControllerGetActiveObjectInfoEventArgs e)
   {
       if (e.Info == null && e.SelectedControl == gridControl1)
       {
           GridView view = gridControl1.FocusedView as GridView;
           GridHitInfo info = view.CalcHitInfo(e.ControlMousePosition);
           if (info.InRowCell)
           {
               int i = Convert.ToInt32(gridView1.GetRowCellDisplayText(info.RowHandle, info.Column));
               
               if (lastRowHandle != info.RowHandle || lastColumn != info.Column)
               {
                   lastColumn = info.Column;
                   lastRowHandle = info.RowHandle;
                   string text = "";
                   if (i > 30000)
                   {
                       text = "here is a big string to display";
                       lastInfo = new ToolTipControlInfo(new GridToolTipInfo(view, new CellToolTipInfo(info.RowHandle, info.Column, "Text")), text);
                   }
                   else
                       lastInfo = new ToolTipControlInfo(new GridToolTipInfo(view, new CellToolTipInfo(info.RowHandle, info.Column, "Text")), i.ToString());
               }
               e.Info = lastInfo;
           }
       }
   }