Generating DLL in visual studio

Question

i am trying to generate dll file, use its .lib file in another program ,but unfortunately, no .lib file is generated! what should i do?

Answer 1

Try it like this:

extern "C" _declspec (dllexport) int add(int a, int b);

extern "C" _declspec (dllexport) int add(int a, int b)
{
    return a + b;
}

Answer 2

You'll need to use __declspec (two underscores) with dllexport attribute to export a symbol from a DLL. And on client side you'll need to use __declspec(dllimport) .

You better put the declaration on header like this:

// YourHeader.H
#ifdef _DLL_EXPORTING // Define this symbol in DLL project setting
#define EXPORT_IMPORT __declspec(dllexport)
#else
#define EXPORT_IMPORT __declspec(dllimport)
#endif

EXPORT_IMPORT int add(int,int);

Let the client use this header directly without worrying about declspec specifier. The EXPORT_IMPORT macro can also be used to export any other functions you want to export/import.