Hi,
When you refer to the DLL functions, what DLL are you calling? Is the DLL something you wrote or did it come from somewhere else? Also, how are you calling the DLL? Are you using the Call Library Function Node in LabVIEW? Is this when you run a VI or when you start an executable? Please provide some more information about what is going on when you receive this warning. It could be that there is some corrupt registry entry on your machine, but we need more details to help.
Donovan