I get a Protection error when calling a VC++ DLL from LabWindows/CVI

[lflpjdm]

Hi everyone,
I have to exchange data from my LabWindows application with a VC++ DLL. I have created another VC++ DLL that will call the C++ functions and transform them into ANSI C. I've integrate the VC++ DLL into my CVI project but when I call a fucntion from the DLL a Protection Errors appears. How can I solve this problem?

[bilalD]

Hello

You can try to pinpoint the problem by debugging the CVI executable from Visual C++ and see where exactly the problem comes up. This will allow you to trace the dll code as called by your CVI executable. Try also loading up the dll at run-time (using LoadLibrary() and GetProcAddress() ) and see if that changes behavior. I'm assuming ofcourse that you have already tried to make a test program with VC++ to check the dll loads up fine.

I hope this helps

Bilal Durrani
NI