Using a SWF to control the properties of a Lectora button

My company has just bought an e-learning package from a provider that dropped a series of SWFs (created in Flash CS3 using ActionScript) into a simple Lectora title. However, all of the 'next' buttons in Lectora were initially invisible. When the SWF finished playing - or in some cases the user finished interacting with the SWF by clicking parts of it - the SWF somehow communicated with Lectora to make the 'next' button visible. The user then clicks the 'next' button to go on to the subsequent Lectora page, on which a new SWF would play (with the Lectora 'next' button again invisible until the SWF told it to display).


Does anyone know how to achieve this? The supplier has confirmed it is a Flash CS3/ActionScript/JavaScript combination, but a confidentiality agreement means the designer cannot share with me how he did it! Very frustrating, because it's a very neat combination that I would like to achieve in my own Lectora titles. Help from the Lectora Lounge community would be very much appreciated.

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