Hi richard1970,

I am not sure which total value you want to check whether it is changed or not. Just save the original one into Session. When you need to compare, then get it from Session and compare with the new one. Just put the related code into the related event. nothing special. Like:

'for saving
Session("total") = original_total

'for comparing
Dim o_total As Integer = Convert.ToInt32(Session("total"))
If o_total <> new_total Then
    'doing something
End If

Thanks,