You can use the ASCOM Client ASCOMPAD to connect a Microsoft Windows compatible Gamepad hand-paddle to the PMC-Eight ASCOM Driver.
There are several steps to getting this to work. There have been several conversations on the PMC-Eight Groups.io message forum on this topic. We have not developed a specific procedure for doing this, but if you search and read the various message threads in the forum on this topic, you should be able to get ASCOMPAD working on your PMC-Eight system.
You can use this link to find all the message threads:
If you have any comments or questions about installing ASCOMPAD just post it on the forum.