Hello, Ben.
We just released the Pololu USB Software Development Kit which shows how to use native USB to communicate with the Maestro. You can read the announcement for more info.
It looks like you have already integrated a .NET motion detection package in to your software, so integrating our .NET class library for the maestro should not be too hard. I recommend adding the Usc project to your application (and the assembly it depends on, UsbWrapper_Windows/UsbWrapper.dll). There are two example programs, MaestroExample and UscCmd that show how to use Usc to control the Maestro.
Please let me know if you have any questions or comments! I’d be glad to help.
–David Grayson