Once the Windows form is displayed, the rest of the code runs there.

Here's what the Open event code looks like:

Private Sub Document_Open()
    ' Salutation Phrases
    frmDocPhrases.lstSal.AddItem _
        "Valued Customer"
    frmDocPhrases.lstSal.AddItem _
        "Tough Nut"
    
    ' The remaining code to initialize
    ' the listboxes isn't shown here.
    ' See the downloaded source for
    ' complete code.
    
    frmDocPhrases.cmdSal_Click
    frmDocPhrases.Show
End Sub

A few comments about design and user interfaces: This example is not a model of excellent system or interface design. It's only intended to be a tutorial example and it has been kept as simple and uncomplicated as possible while still getting across the main points. For example, a real system would probably load the listboxes from a file or database and would likely have a satellite system that made it easy to update and change the phrases. In this example, we would have to change the VBA code - not a good design choice! And there are lots of other upgrades that a real system would have. This one doesn't have any error handling and a real one most certainly should have that.