dll-import-and-export-functions.md

description	title	ms.date	helpviewer_keywords	ms.assetid
Learn more about: DLL Import and Export Functions	DLL Import and Export Functions	11/04/2016	DLLs [C++], importing dllimport attribute [C++], storage-class attribute DLL exports [C++] declaring functions, with dllexport and dllimport extended storage-class attributes dllexport attribute [C++], storage-class attribute	08d164b9-770a-4e14-afeb-c6f21d9e33e4

DLL Import and Export Functions

Microsoft Specific

The most complete and up-to-date information on this topic can be found in dllexport, dllimport.

The dllimport and dllexport storage-class modifiers are Microsoft-specific extensions to the C language. These modifiers explicitly define the DLL's interface to its client (the executable file or another DLL). Declaring functions as dllexport eliminates the need for a module-definition (.DEF) file. You can also use the dllimport and dllexport modifiers with data and objects.

The dllimport and dllexport storage-class modifiers must be used with the extended attribute syntax keyword, __declspec, as shown in this example:

#define DllImport   __declspec( dllimport )
#define DllExport   __declspec( dllexport )

DllExport void func();
DllExport int i = 10;
DllExport int j;
DllExport int n;

For specific information about the syntax for extended storage-class modifiers, see Extended Storage-Class Attributes.

END Microsoft Specific

See also

C Function Definitions