when I paste from Excel into the WebGrid, whether I am replacing an existing row or adding a new row, the grid does not know a change was made to it on page post-back...

I'm firing these events via the grid:
Protected Sub PerformanceGrid_UpdateGrid(ByVal sender As Object, ByVal e As Infragistics.WebUI.UltraWebGrid.UpdateEventArgs) Handles PerformanceGrid.UpdateGrid
Protected Sub PerformanceGrid_AddRowBatch(ByVal sender As Object, ByVal e As Infragistics.WebUI.UltraWebGrid.RowEventArgs) Handles PerformanceGrid.AddRowBatch
Protected Sub PerformanceGrid_UpdateRowBatch(ByVal sender As Object, ByVal e As Infragistics.WebUI.UltraWebGrid.RowEventArgs) Handles PerformanceGrid.UpdateRowBatch

none of these are being fired

I'm also checking for any changes this way on page postback:
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
For Each GridRow As UltraGridRow In PerformanceGrid.Rows
If GridRow.DataChanged = DataChanged.Modified Or GridRow.DataChanged = DataChanged.Added
....
Then
End If
Next
End Sub

and the newly added and/or updated row via the paste is skipped right over.

Is there a way I can manually set these flags when a paste occurrs into my grid? I could catch the event on the client-side with AfterClipBoardOperation and then set it there, so on postback, my grid knows what was added or changed...

If I can't do this manually, then what is the value in having a grid that can have data pasted into it, only to not be able to act on that data when a grid is posted back?

Thanks,
Mike