One another option:
Use the default defined macro local to the project.
You can see the default defined macros local to the project in the below location:
Properties -> C/C++ -> Preprocessor -> Preprocessor Definition.
Example:
Suppose your Project Name is: MyDLL
Default Macro Local to that project: MYDLL_EXPORTS
#ifdef MYDLL_EXPORTS
/*Enabled as "export" while compiling the dll project*/
#define DLLEXPORT __declspec(dllexport)
#else
/*Enabled as "import" in the Client side for using already created dll file*/
#define DLLEXPORT __declspec(dllimport)
#endif