Most of the functions exposed by the kernel.bdh of Silk Performer are implemented in PerfDotNetFW.DLL, which is a .NET assembly that comes with Silk Performer. The methods are static methods in the SilkPerformer.Bdl class. As Silk Performer is an imported namespace you can call the methods with Bdl.<MethodName>. PerfDotNetFW.dll is referenced by default when you create a Silk Performer .NET project.