Thank you, Ben and Greg, for your effort. But my solution for now is not to use DLLs. I have only little time left for my project, so I can't spend any time in this problem. But to the idea with the wrapper VI: I don't believe that this would help, because even the wrapper VI will run in the same name/memory space. And the problem would only be moved one level down, but is not really solved.
But I will come back to this problem, when I have more time and I will post it. I think there must be a solution... Thanx again, Michael
