class TESTDLL_LIBSHARED_EXPORT TestDLL_lib

Question

I'm beginning with QLibrary, in this context I've reached the Stack Overflow question "QLibrary - import a class". And I have a question about that question:

What the meaning of TESTDLL_LIBSHARED_EXPORT in the class declaration?

class TESTDLL_LIBSHARED_EXPORT TestDLL_lib
{

public:
    TestDLL_lib();

    int a;
    int b;
    int c;

    int getValues();
};

Please refer to http://stackoverflow.com/questions/4555961/how-to-use-a-class-in-dll. for answer — user258367, Mar 11 '16 at 08:53
I see Microsoft mentions in that question. Is it specific to Microsoft compiler? I'm using Qt/MinGW on Windows. — KcFnMi, Mar 11 '16 at 09:18
Oh, I think now I see, it must be a macro for ` __declspec(dllexport)`, right? — KcFnMi, Mar 11 '16 at 09:25

score 0 · Answer 1 · edited May 23 '17 at 12:15

Please refer to How to use a class in DLL? for detail answer.

you can export data, functions, classes, or class member functions from a DLL using the __declspec(dllexport) keyword. __declspec(dllexport) adds the export directive to the object file so you do not need to use a .def file. To export all of the public data members and member functions in a class, the keyword must appear to the left of the class name as follows:

class TESTDLL_LIBSHARED_EXPORT TestDLL_lib

class TESTDLL_LIBSHARED_EXPORT TestDLL_lib

1 Answers1