The first one uses the obsolete type PASCAL. This has been mapped to __stdcall so that is what you should put in your Call Library Node.
The second one doesn't declare an explicit calling convention so I have to make some assumptions:
1. This is not a member fuction of a C++ class.
2. You haven't defined an explicity calling convension in the compiler (such as /Gz or /Gr).
In that case, it defaults to __cdecl.