use WXDLLIMPEXP_FWD_CORE instead of WXDLLEXPORT

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@49004 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/treectrl.h

@@ -30,8 +30,8 @@
 #endif // Cygwin
 
 // fwd decl
-class  WXDLLEXPORT wxImageList;
-class  WXDLLEXPORT wxDragImage;
+class  WXDLLIMPEXP_FWD_CORE wxImageList;
+class  WXDLLIMPEXP_FWD_CORE wxDragImage;
 struct WXDLLIMPEXP_FWD_CORE wxTreeViewItem;
 
 #if WXWIN_COMPATIBILITY_2_6

src/msw/dialup.cpp

@@ -163,7 +163,7 @@ struct WXDLLEXPORT wxRasThreadData
     HANDLE  hEventRas,  // automatic event which RAS signals when status changes
             hEventQuit; // manual event which we signal when we terminate
 
-    class WXDLLEXPORT wxDialUpManagerMSW *dialUpManager;  // the owner
+    class WXDLLIMPEXP_FWD_CORE wxDialUpManagerMSW *dialUpManager;  // the owner
 };
 
 // ----------------------------------------------------------------------------

src/msw/mimetype.cpp

@@ -45,7 +45,7 @@
 #include <ctype.h>
 
 // in case we're compiling in non-GUI mode
-class WXDLLEXPORT wxIcon;
+class WXDLLIMPEXP_FWD_CORE wxIcon;
 
 // These classes use Windows registry to retrieve the required information.
 //