Convert ActiveX to NPAPI
You need to write a layer that translates between NPAPI and the ActiveX control (for both directions). While it should be possible to solve mostly mostly, I don't know what code you can use.
If you're considering using FireBreath , this ActiveX wrapper example should help you. Note that if you can afford to port your plugin to FireBreath, it already generates NPAPI and ActiveX plugins from the same source base for you.
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