Category 

Modifiers, Keyword extensions, Storage class specifiers 

Syntax  

__declspec( dllexport ) declarator

The dllexport storage-class attribute is used for Microsoft C and C++ language compatibility. This attribute enables you to export functions, data, and objects from a DLL. This attribute explicitly defines 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.