call library function node: passing pointers

[Esther.Lopez]

I know there are another posts about this issue, but I still have doubts.
I have a function prototype in a dll that is "void StartServer (char *pServerIP, long ServerPort)"
The pServerIP variable is a string. If I add this argument as string, and select "C String Pointer", the prototype on the LabVIEW call library function node is: "void StartServer(CStr pServerIPAddr, long ServerPort)".
It's the first time I use it, and I would like to know if it is the same.
Thank you!!"

[LarsRoe]

Yes, CStr is equivalent to char *. You can look in extcode.h for the definition of CStr.

[Esther.Lopez]

thanks for your answer. where is this file?
I'm having a lot of problems using the Call Library function node. perhaps you can help me...
It's the first time I use it, and I have to call a function developed in C++, and built in a DLL. I haven't develop this dll. When I insert it in my LabVIEW code, LabVIEW is automatically closed. Is there any way to know if the problem is in the dll or in my code? I just pass a string control, and a numeric control to the "Call library function node"...

Thanks!!!!

[LarsRoe]

It should be in the cintools folder. There is a pdf document "Calling External Code" that should cover all of the details, but I'd guess you are using the wrong calling convention (cdecl or stdcall/WINAPI). Try using the other type of calling convention.