When you have the Visual Studio files:
Build from command-line our FMUSimulator.dll
-1) Open a terminal
-2) Navigate to org.simantics.fmil.core/native/FMUSimulator
-3) Run "msbuild.exe"
+1) Open a VS development terminal
+2) Navigate to org.simantics.fmil.core/native
+3) Run "windowsbuildsim.bat"