I am new in Lightswitch and EF and WCF RIA Service.
</br>I try to include a foxpro database into lightswitch.
There is an Dataprovider for VFP to EF6. So I have a nice EF6 Data Model.
I downloaded OPENRIAServices.Server and OPENRIA.services for EF6
</br>Then Open RIA Services Tools Support Installer
But now I don't know how to build the Domain Service
I hope that there is a documentation somewhere
Sounds like you missed the tooling itself. https://visualstudiogallery.msdn.microsoft.com/1c7b3c91-4e43-4c30-992e-00c67f80b2c9
Once you have the tooling installed, the documentation from Lightswitch should lead you through how to do things. Unfortunately, I don't use Lightswitch or FoxPro so I can't help you on those fronts.
Thank you, that was the solution.