The selectiontype in web listbox does not seem to exist. Is there something I can do in SelectionChanged to prevent this - ie: deselect all other rows?
Sure.
For i as Integer = 0 to me.listcount-1
If i<>me.listindex then
Me.selected(i) = false
End If
Next i
says “For i as Integer = 0 to me.listcount” does not exist
ahh - RowCount