From seeing here if I am not mistaken those should be managed dlls. I achieve the same result if I follow the procedure here with the dumpbin.exe program.
So everything should be fine.
But when I do that
CWorkpiece instance = new CWorkpiece(); I get the following error
That said I have thought that perhaps I had done a wrong investigation but adding the following lines didn't help
[DllImport("C:\\Temp\\1\\Okuma.CLDATAPI.dll")] public static extern int CWorkpiece();
So in short the problem is all related with that dll which can't be found Thank you in advance for any help Patrick