Trigger event when select from dropdown

Question

I need when a user selects an option from the dropdown menu, it will trigger the event and lock down certain range of cells. I got the codes for lockdown cell but I can\'t l

Answer 1

an example can be found here with named ranges:

http://www.sebastianviereck.de/en/VBA-dropdown-change-event-to-perform-action/

Answer 2

If you're using a data validation dropdown, you can use the Worksheet_Change event like so:

Private Sub Worksheet_Change(ByVal Target As Range)
If Target.Address = "$A$1" Then
    With Application
        .EnableEvents = False
        .ScreenUpdating = False
        .Calculation = xlCalculationManual
    End With

    ' Code to lock ranges goes here

    With Application
        .EnableEvents = True
        .ScreenUpdating = True
        .Calculation = xlCalculationAutomatic
    End With
End If
End Sub

This assumes that your data validation is in cell A1. You'll have to update the reference as appropriate for your situation.