Disallow adding Serial Numbers on the fly when fulfilling Orders in Dynamics GP

If you want to prevent users from adding new Serial Numbers on the fly when fulfilling Sales Documents in Dynamics GP try this:

1. Add the Sales Serial Number Entry window to VBA
2. On the Window_BeforeModalDialog event paste in this code:

If PromptString = "Do you want to add this serial number?" Then

    Answer = dcButton2

    MsgBox "You must select a serial number from the list of available serial numbers."

End If

Now, when a user attempts to add a serial number on the fly when fulfilling a Sales Document they will be presented with a message instructing them to pick one from the list instead.