Hello Simon, Thank you for contacting National Instruments.
When you created your DLL in LabVIEW, a LIB file should also have been created. To call the DLL in C#, make sure that you include the LIB file in C#. In answer to your questions: 1. You can solve this problem by including the LIB file in C#. 2. You will not have this problem if you dynamically link the driver. 3. You do not need to link the Run-time engine DLLs to make it work in both static and dynamic loading. I hope this helps. Let me know if this does not solve your problem. Sean C. Applications Engineer National Instruments
