Found an example of DBZ. This and many other C# DLL examples will be included in the "Example Files" ZIp filein the coming January download ->

<!--Divide-By_Zero.aspx-->

<script language='vb' runat='server'>
Sub Page_Load(Source as Object, E as EventArgs)
Dim Mydb As New Tornado.Z()
'... Module 1 display the normal Budget Data
With Mydb
.dbQP = "type=Excel| U=1| S=ASPdbBB| D=BudgetSS.xls| ps=-1| TextHolder=Title=MagicCell - Normal| Q=Budget| ni=none"
.ASPdbNET()
'... Module 2 adds a calculated field of available budget % anticipating 'Divide By Zero' problem
.dbQP = "type=Excel| U=2| S=ASPdbBB|D=BudgetSS.xls| ps=-1| TextHolder=Title=MagicCell - Divide By Zero| ni=none| nh=t"
.dbSQL = "SELECT Dept, Budget, Expense, 'dummy' as Available From Budget"
.dbGridMagicCell = "field=3| macro=<<(#Budget#-#Expense#)/#Budget#>>"
.dbOptions="DBZ=No Budget"
.ASPdbNET()
End With

'BudgetSS.xls file ->
'
'Dept Budget Expense
'A 10000 5200
'B 25000 1200
'C 0 750
'D 35000 100
'E 75000 3500
'F 0 2400

End Sub
</script>