And to make this more fun, this is breaking in VBScript (WSH5.6, cscript.exe):

Set oCat = CreateObject("ADOX.Catalog")
Set oTable = CreateObject("ADOX.Table")
Set oIndex = CreateObject("ADOX.Index")
Set oCols = oTable.Columns
oCat.ActiveConnection = oCacheConn.ConnectionString
Set oTable = oCat.Tables("accidentstate")
With oIndex
.Name = "nuindex"
.Columns.Append cResultTable
End With
oTable.Indexes.Append oIndex

The error I get is:
Microsoft OLE DB Provider for Visual FoxPro: Variable '' is not found.