How to keep original function return value after using Variadic Macros?

It is a VS2010 C++ project. I have a list of APIs:

1. int a = API1("para1", "para2", ...);

2. double a = API2("para1", "para2", ...);

3. float a = API3("para1", "para2", ...);

Now, I need to add a new API, APINEW(). As long as above APIs are run, APINEW need to called as follow. Therefore, I decided to use the Variadic Macros as shown below:

#define newAPI1(...) ( API1(__VA_ARGS__); APINEW() )

#define newAPI2(...) ( API2(__VA_ARGS__); APINEW() )

#define newAPI3(...) ( API3(__VA_ARGS__); APINEW() )

However, I will not correctly get the return value from my API1, API2 and API3.

I am trying to use the following code since I know the marco will always return the last item, but it cannot pass the compile.

#define newAPI1(...) ( {auto a = API1(__VA_ARGS__); APINEW(); a} )

I wonder is there a way that can make it correct? (The reason I use new name (e.g. newAPI1) is to avoid comflict because in the project, it may have other macros that overload the existing API1, API2 and API3.)

Another question: is there a way to pass the combination of

1. first parameter of __VA_ARGS__
2. __FUNCTION__
3. __LINE__

into the APINEW parameter => APINEW(first parameter of __VA_ARGS__ + __FUNCTION__ + __LINE__)