- Modified "Wave X" text for "Tabla del X"

- Implemented return values for messages
- Implemented one digit answers
- Project upgraded to VS2017

api.h

@@ -47,3 +47,5 @@ void RegisterMessage(const char* msg, System* handler);
 void SendMessage(const char* msg, int p1 = 0, int p2 = 0, int p3 = 0, int p4 = 0, int p5 = 0);
 
 int* GetMessageParams();
+int GetMessageReturn();
+void SetMessageReturn(int value);