This issue tracks that the existing class to manage loading / unloading dxcompiler.dll, namely DxcDllSupport, is modified. The reason modifications are necessary are so that a new class can inherit from DxcDllSupport, and add new methods for checking the status of dxil.dll. The new class will also have an instance of DxcDllSupport, so that dxcompiler.dll can be managed.
The new class will have mechanisms for reading environment variables, loading dxil.dll, and checking whether the load was successful or not.