Moved some of the STDMETHOD/STDAPI to winnt.h.
Moved the EXTERN_C macro to winnt.h.
Added a '#ifndef __WINE__' around the remaining macros.

include/objbase.h

diff --git a/include/objbase.h b/include/objbase.h
index f5f67cc..88e0445 100644
--- a/include/objbase.h
+++ b/include/objbase.h
@@ -36,37 +36,13 @@
 }
 #endif
 
-
-/*    These macros are msdev's way of defining COM objects. They are provided 
- * here for use by winelib users.
+#ifndef __WINE__
+/* These macros are msdev's way of defining COM objects. 
+ * They are provided here for use by Winelib developpers.
  */
-
-#ifdef __cplusplus
-    #define EXTERN_C    extern "C"
-#else
-    #define EXTERN_C    extern
-#endif
-
-#define STDMETHODCALLTYPE       __stdcall
-#define STDMETHODVCALLTYPE      __cdecl
-#define STDAPICALLTYPE          __stdcall
-#define STDAPIVCALLTYPE         __cdecl
-
 #define FARSTRUCT
 #define HUGEP
 
-#define STDAPI                  EXTERN_C HRESULT STDAPICALLTYPE
-#define STDAPI_(type)           EXTERN_C type STDAPICALLTYPE
-
-#define STDMETHODIMP            HRESULT STDMETHODCALLTYPE
-#define STDMETHODIMP_(type)     type STDMETHODCALLTYPE
-
-#define STDAPIV                 EXTERN_C HRESULT STDAPIVCALLTYPE
-#define STDAPIV_(type)          EXTERN_C type STDAPIVCALLTYPE
-
-#define STDMETHODIMPV           HRESULT STDMETHODVCALLTYPE
-#define STDMETHODIMPV_(type)    type STDMETHODVCALLTYPE
-
 #define WINOLEAPI        STDAPI
 #define WINOLEAPI_(type) STDAPI_(type)
 
@@ -112,6 +88,8 @@
 #define BEGIN_INTERFACE
 #define END_INTERFACE
 
-#endif
+#endif /* __cplusplus && !CINTERFACE */
+
+#endif /* __WINE__ */
 
 #endif /* __WINE_OBJBASE_H */

include/winnt.h

diff --git a/include/winnt.h b/include/winnt.h
index 3cf860c..0b90e92 100644
--- a/include/winnt.h
+++ b/include/winnt.h
@@ -196,6 +196,30 @@
 
 /**** winnt.h proper *****/
 
+/* Microsoft's macros for declaring functions */
+
+#ifdef __cplusplus
+# define EXTERN_C    extern "C"
+#else
+# define EXTERN_C    extern
+#endif
+
+#ifndef __WINE__
+#define STDMETHODCALLTYPE       __stdcall
+#define STDMETHODVCALLTYPE      __cdecl
+#define STDAPICALLTYPE          __stdcall
+#define STDAPIVCALLTYPE         __cdecl
+
+#define STDAPI                  EXTERN_C HRESULT STDAPICALLTYPE
+#define STDAPI_(type)           EXTERN_C type STDAPICALLTYPE
+#define STDMETHODIMP            HRESULT STDMETHODCALLTYPE
+#define STDMETHODIMP_(type)     type STDMETHODCALLTYPE
+#define STDAPIV                 EXTERN_C HRESULT STDAPIVCALLTYPE
+#define STDAPIV_(type)          EXTERN_C type STDAPIVCALLTYPE
+#define STDMETHODIMPV           HRESULT STDMETHODVCALLTYPE
+#define STDMETHODIMPV_(type)    type STDMETHODVCALLTYPE
+#endif
+
 /* Define the basic types */
 #ifndef VOID
 #define VOID void