Add-in for Microsoft power point

As in Microsoft Word "Track Changes" functionality, I need a development for an Add-on for tracking changes in Microsoft PowerPoint. Currently Microsoft PowerPoint lacks of this functionality, PowerPoint has similar functionalities to track changes or compare between versions but not as in Word. Please review Microsoft Word "Track Changes" functionality to work in a similar functionality but for Microsoft PowerPoint. Here I include a video link so you can review the functionality: [login to view URL] I need just the same functionality as in Track Changes from Microsoft Word. The original code is needed once development is finished. The developer would need experience and understand perfectly the Microsoft Word track changes functionality. To prevent users to share and copy the executable and installer file from one computer to other without paying, It is needed to generate one dll file in system 32 so when the user install it and once the file generate the micros, cannot be used again, so after that the user have to contact me if they need to use it again.