update per oldnewthing

Author: mikeblome

docs/build/exporting-from-a-dll-using-def-files.md

@@ -1,6 +1,6 @@
 ---
 title: "Exporting from a DLL Using DEF Files"
-ms.date: "11/04/2016"
+ms.date: "01/09/2018"
 helpviewer_keywords: ["def files [C++], exporting from DLLs", ".def files [C++], exporting from DLLs", "exporting DLLs [C++], DEF files"]
 ms.assetid: 9d31eda2-184e-47de-a2ee-a93ebd603f8e
 ---
@@ -25,7 +25,7 @@ EXPORTS
    Min   @4
 ```
 
-If you use the [MFC DLL Wizard](../mfc/reference/mfc-dll-wizard.md) to create an MFC DLL, the wizard creates a skeleton .def file for you and automatically adds it to your project. Add the names of the functions to be exported to this file. For non-MFC DLLs, you must create the .def file yourself and add it to your project.
+If you use the [MFC DLL Wizard](../mfc/reference/mfc-dll-wizard.md) to create an MFC DLL, the wizard creates a skeleton .def file for you and automatically adds it to your project. Add the names of the functions to be exported to this file. For non-MFC DLLs, create the .def file yourself and add it to your project. Then go to **Project** > **Properties** > **Linker** > **Input** > **Module Definition File** and enter the name of the .def file. Repeat this step for each configuration and platform, or do it all at once by selecting **Configuration = All Configurations**, and **Platform = All Platforms**.
 
 If you are exporting functions in a C++ file, you have to either place the decorated names in the .def file or define your exported functions with standard C linkage by using extern "C". If you need to place the decorated names in the .def file, you can obtain them by using the [DUMPBIN](../build/reference/dumpbin-reference.md) tool or by using the linker [/MAP](../build/reference/map-generate-mapfile.md) option. Note that the decorated names produced by the compiler are compiler specific. If you place the decorated names produced by the Visual C++ compiler into a .def file, applications that link to your DLL must also be built using the same version of Visual C++ so that the decorated names in the calling application match the exported names in the DLL's .def file.