How create DLL from header and lib

Question

I have Math.h and Math.lib. How I create dynamic link library from this files?

Answer 1

You can create project for Dynamic Link Library (DLL) and add Math.lib as input library in project properties. Also you classes in Math.h should be exported (use __declspec(dllexport) and __declspec(dllimport) for that).

#pragma once
#ifdef MATH_DLL
#define EXPORT_CLASS __declspec(dllexport)
#else
#define EXPORT_CLASS __declspec(dllimport)
#endif

class EXPORT_CLASS Math {
public:
    Math( double y );
    int DoSomething( int x );
};

Macro MATH_DLL should be defined in preprocessor definitions in project properties.