Hi Eric,

Listen for the AfterXmlHttpResponseProcessed client side event...something like the following:

function UltraWebGrid1_AfterXmlHttpResponseProcessed(gridName) {

       // grid has finished loading the current set of data...

       // be extra clever and display to the user how many rows have actually been loaded
       var grid = igtbl_getGridById(gridName);
       var total = grid.RowsServerLength;
       var loaded = grid.RowsRetrieved;

      if (loaded < total) {
           alert(loaded + ' of ' + total + ' rows loaded');
      } else {
           alert('Grid has loaded all ' + total + ' rows');
      }

      return;

}