Update afx-extension-module-structure_1.cpp

The first two parameters of the structure AFX_EXTENSION_MODULE are BOOL and HMODULE. So initialisation with = { NULL, NULL } is inaccurate: first NULL is FALSE (or 0 due to BOOL is defined as int). In fact this expression cannot be transformed to modern C++ equivalent = { nullptr, nullptr }.

struct AFX_EXTENSION_MODULE
{
BOOL bInitialized;
HMODULE hModule;
HMODULE hResource;
CRuntimeClass* pFirstSharedClass;
COleObjectFactory* pFirstSharedFactory;
};

Author: yury-fedorov

docs/atl-mfc-shared/codesnippet/CPP/afx-extension-module-structure_1.cpp

@@ -1,4 +1,4 @@
-static AFX_EXTENSION_MODULE NVC_MFC_DLLDLL = { NULL, NULL };
+static AFX_EXTENSION_MODULE NVC_MFC_DLLDLL = { 0 };
 extern "C" int APIENTRY
 DllMain(HINSTANCE hInstance, DWORD dwReason, LPVOID lpReserved)
 {
@@ -11,4 +11,4 @@ DllMain(HINSTANCE hInstance, DWORD dwReason, LPVOID lpReserved)
 
         // MFC extension DLL one-time initialization
         if (!AfxInitExtensionModule(NVC_MFC_DLLDLL, hInstance))
-            return 0;
+            return 0;