_declspec(dllexport)与_declspec(dllimport)

_declspec(dllexport)作用：

These attributes explicitly define the DLL's interface to its client, which can be the executable file or another DLL. Declaring functions as dllexport eliminates the need for a module-definition (.DEF) file, at least with respect to the specification of exported functions.

注意： 

dllexport of a C++ function will expose the function with C++ name mangling. If C++ name mangling is not desired, either use a .def file (EXPORTS keyword) or declare the function as extern "C".

 

_declspec(dllimport)是在别的程序里面调用的时候需要进行的声明。只有在DLL内部dllexport之后，在外部才可以被import。

 

参考：

dllexport, dllimport

程序中使用动态连接库 && _declspec(dllexport)与_declspec(dllimport)

Using extern to Specify Linkage