I didn't mean the .dll code, I meant the header you are using in the Lite-C File. However, i saw you have done this just in the Lite-C file. Change your header to "BSTR Get_SAttributValue(STRING* file, STRING* xpath, STRING* attribut)". Make sure you have defined BSTR in the lite-c file. However, you can't use str_copy with that type.

The difference is, that Lite-C cares about types. C-Script had no type check in its compiler. It's important now that you always use the correct type when calling .dll functions.