Question

I’m trying to create a class that manages the events of a combo box in Access 2010. Here you have the code:

Class TestEvents

Public WithEvents cbMyCombo As Access.ComboBox

Public Property Get AssociatedCombo() As Access.ComboBox
    Set AssociatedCombo = cbMyCombo
End Property

Public Sub cbMyCombo_Change()
    MsgBox "Combo has changed!"
End Sub

Private Sub Class_Initialize()
   Set cbMyCombo = Form_Form1.Combo1
End Sub

Form1 Code (Contains a combobox named Combo1)

Option Compare Database
Option Explicit
Private MyTestEvents As TestEvents

Private Sub Form_Load()
   Set MyTestEvents = New TestEvents
   MsgBox MyTestEvents.AssociatedCombo.Name
End Sub

When running the code, I get (as expected) a message with the combobox name (Combo1), so the TestEvents.AssociatedCombo property is pointing to the right object but nothing happens when I change the combo value. I would expect to get the message “Combo has changed”.

Is there anything I’m doing wrong?

Thanks in advance for your help 🙂

Answer 1

By default events sunk for a form control are not raised in VBA at all; to enable them (and subsequently enable your WithEvents) you need to wire up each event you want to handle;

Set cbMyCombo = Form_Form1.Combo1 '//please put this in a property!

cbMyCombo.OnKeyDown = "[Event Procedure]"
cbMyCombo.OnBlaDeBla = "[Event Procedure]"

(Note that’s the actual string value you need to set, not a placeholder/example)

You can also do this on the Events tab of the control properties.