TextMesh Pro Creatng a dll of TextMesh Pro

I am looking at compiling TextMesh pro into a dll that we can easily share between our applications. This will allow us to ensure that all the applications are using the same version of TextMesh.

[Note: Using Visual Studio 2017]
I am able to compile into the dll, and access the files in Unity ok. But I am running into issues wrapping up the "assets". So right now I get a warning:
"Could not located the "TextMesh Pro/GUISkins" Folder to load the Editor Skins.

Has anyone tried creating a dll and "inserting" accessible assets files into the dll?
Could anyone send me a few hints? I know that I have several "Build Action" options for including the files in the dll. I am experimented with several of them. Resources, Content, Embedded. But so far no luck.