Is there a way to select a TextBox input if a checkbox is ticked? VBA Excel

As you can see in the below image, I have several checkboxes representing measures and the last two are supposed allow for additional measures. The textboxes on the front allow the user to specify the name of their measure.

I was able to successfully send the name (caption) of the ticked checkboxes to a Listbox using the following code:

Dim ctrl As Control

For Each ctrl In Me.Controls
    If TypeName(ctrl) = "CheckBox" Then
        If ctrl.Value = True Then
            ListBox1.AddItem ctrl.Caption
        End If
    End If
Next ctrl

However, if the user selects the "Additional measures" checkbox I want what they inputted in the textboxes to be added to the list box, instead of the checkbox caption.

Is there any way I can do that?