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Message: [QUOTE="pdxphil, post: 6912512"] Hi, I have a project that requires a 3D viewer control be inserted into a slide. I have looked at ActiveX controls and OLE a bit but still am unsure of the best approach. Ideally the viewer will be 'inserted' into the active slide via an external application (can you do this through the PP COM Object Model). The other requirement is that the extneral app will push data to the viewer control that the viewer requires to operate (a few basic functions). Lastly, the viewer object should persist upon closing of the Powerpoint document and be reloaded with its associated properties/data (received from the external app) when re-opened. Any guidance on OLE vs ActiveX vs ?? appreciated. I have looked at some articles which discuss 'COM Add-Ins' which implement the IDTExensibility2 interface (create in C++ or C#). Thanks for reading. [/QUOTE]