diff --git a/dlls/avifil32/avifile.c b/dlls/avifil32/avifile.c
index b1220bcec8a..3dbc987e566 100644
--- a/dlls/avifil32/avifile.c
+++ b/dlls/avifil32/avifile.c
@@ -152,6 +152,7 @@ static HRESULT WINAPI IAVIFile_fnDeleteStream(IAVIFile*iface,DWORD fccType,LONG
 }
 
 struct ICOM_VTABLE(IAVIFile) iavift = {
+    ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
     IAVIFile_fnQueryInterface,
     IAVIFile_fnAddRef,
     IAVIFile_fnRelease,
@@ -330,6 +331,7 @@ HRESULT WINAPI IAVIStream_fnSetInfo(IAVIStream*iface,AVISTREAMINFOW*info,LONG in
 }
 
 struct ICOM_VTABLE(IAVIStream) iavist = {
+    ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
     IAVIStream_fnQueryInterface,
     IAVIStream_fnAddRef,
     IAVIStream_fnRelease,
diff --git a/dlls/shell32/contmenu.c b/dlls/shell32/contmenu.c
index 861d008ea95..df46fbd4428 100644
--- a/dlls/shell32/contmenu.c
+++ b/dlls/shell32/contmenu.c
@@ -455,6 +455,7 @@ static HRESULT WINAPI IContextMenu_fnHandleMenuMsg(
 */
 static struct ICOM_VTABLE(IContextMenu) cmvt = 
 {	
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 	IContextMenu_fnQueryInterface,
 	IContextMenu_fnAddRef,
 	IContextMenu_fnRelease,
diff --git a/dlls/shell32/dataobject.c b/dlls/shell32/dataobject.c
index 5c9e7587d57..e101244c833 100644
--- a/dlls/shell32/dataobject.c
+++ b/dlls/shell32/dataobject.c
@@ -43,6 +43,7 @@ static HRESULT WINAPI IEnumFORMATETC_fnClone(LPENUMFORMATETC iface, LPENUMFORMAT
 
 static struct ICOM_VTABLE(IEnumFORMATETC) efvt = 
 {
+    ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
         IEnumFORMATETC_fnQueryInterface,
         IEnumFORMATETC_fnAddRef,
     IEnumFORMATETC_fnRelease,
@@ -363,6 +364,7 @@ static HRESULT WINAPI IDataObject_fnEnumDAdvise(LPDATAOBJECT iface, IEnumSTATDAT
 
 static struct ICOM_VTABLE(IDataObject) dtovt = 
 {
+    ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
         IDataObject_fnQueryInterface,
         IDataObject_fnAddRef,
     IDataObject_fnRelease,
diff --git a/dlls/shell32/enumidlist.c b/dlls/shell32/enumidlist.c
index 2d8d8d3983d..eca48cb79f7 100644
--- a/dlls/shell32/enumidlist.c
+++ b/dlls/shell32/enumidlist.c
@@ -401,7 +401,9 @@ static BOOL WINAPI IEnumIDList_fnDeleteList(
  *  IEnumIDList_fnVTable
  */
 static ICOM_VTABLE (IEnumIDList) eidlvt = 
-{	IEnumIDList_fnQueryInterface,
+{
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
+	IEnumIDList_fnQueryInterface,
 	IEnumIDList_fnAddRef,
 	IEnumIDList_fnRelease,
 	IEnumIDList_fnNext,
diff --git a/dlls/shell32/folders.c b/dlls/shell32/folders.c
index 02aacbc3411..cb524eefb88 100644
--- a/dlls/shell32/folders.c
+++ b/dlls/shell32/folders.c
@@ -217,7 +217,9 @@ static HRESULT WINAPI IExtractIconA_fnExtract(IExtractIconA * iface, LPCSTR pszF
 }
 
 static struct ICOM_VTABLE(IExtractIconA) eivt = 
-{	IExtractIconA_fnQueryInterface,
+{	
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
+	IExtractIconA_fnQueryInterface,
 	IExtractIconA_fnAddRef,
 	IExtractIconA_fnRelease,
 	IExtractIconA_fnGetIconLocation,
@@ -289,6 +291,7 @@ static HRESULT WINAPI IEIPersistFile_fnLoad(IPersistFile* iface, LPCOLESTR pszFi
 
 static struct ICOM_VTABLE(IPersistFile) pfvt =
 {
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 	IEIPersistFile_fnQueryInterface,
 	IEIPersistFile_fnAddRef,
 	IEIPersistFile_fnRelease,
diff --git a/dlls/shell32/regstream.c b/dlls/shell32/regstream.c
index 67aeb8a7b0c..68dab92e760 100644
--- a/dlls/shell32/regstream.c
+++ b/dlls/shell32/regstream.c
@@ -249,6 +249,7 @@ HRESULT WINAPI IStream_fnClone (IStream * iface, IStream** ppstm)
 
 static struct ICOM_VTABLE(IStream) rstvt = 
 {	
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 	IStream_fnQueryInterface,
 	IStream_fnAddRef,
 	IStream_fnRelease,
diff --git a/dlls/shell32/shelllink.c b/dlls/shell32/shelllink.c
index 1cde64c9453..fca690e2fa4 100644
--- a/dlls/shell32/shelllink.c
+++ b/dlls/shell32/shelllink.c
@@ -246,6 +246,7 @@ static HRESULT WINAPI IPersistFile_fnGetCurFile(const IPersistFile* iface, LPOLE
   
 static struct ICOM_VTABLE(IPersistFile) pfvt = 
 {
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 	IPersistFile_fnQueryInterface,
 	IPersistFile_fnAddRef,
 	IPersistFile_fnRelease,
@@ -389,6 +390,7 @@ static HRESULT WINAPI IShellLink_CF_LockServer(IClassFactory* iface, BOOL fLock)
 }
 static ICOM_VTABLE(IClassFactory) slcfvt = 
 {
+    ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
     IShellLink_CF_QueryInterface,
     IShellLink_CF_AddRef,
   IShellLink_CF_Release,
@@ -636,7 +638,9 @@ static HRESULT WINAPI IShellLink_fnSetPath(IShellLink * iface, LPCSTR pszFile)
 */
 
 static ICOM_VTABLE(IShellLink) slvt = 
-{	IShellLink_fnQueryInterface,
+{	
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
+	IShellLink_fnQueryInterface,
 	IShellLink_fnAddRef,
 	IShellLink_fnRelease,
 	IShellLink_fnGetPath,
@@ -786,6 +790,7 @@ static HRESULT WINAPI IShellLinkW_CF_LockServer(LPCLASSFACTORY iface, BOOL fLock
 
 static ICOM_VTABLE(IClassFactory) slwcfvt = 
 {
+    ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
     IShellLinkW_CF_QueryInterface,
     IShellLinkW_CF_AddRef,
   IShellLinkW_CF_Release,
@@ -1049,7 +1054,9 @@ static HRESULT WINAPI IShellLinkW_fnSetPath(IShellLinkW * iface, LPCWSTR pszFile
 */
 
 static ICOM_VTABLE(IShellLinkW) slvtw = 
-{	IShellLinkW_fnQueryInterface,
+{	
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
+	IShellLinkW_fnQueryInterface,
 	IShellLinkW_fnAddRef,
 	IShellLinkW_fnRelease,
 	IShellLinkW_fnGetPath,
diff --git a/dlls/shell32/shellole.c b/dlls/shell32/shellole.c
index cdcea4ab0f5..ec67460f0d1 100644
--- a/dlls/shell32/shellole.c
+++ b/dlls/shell32/shellole.c
@@ -371,6 +371,7 @@ static HRESULT WINAPI IClassFactory_fnLockServer(LPCLASSFACTORY iface, BOOL fLoc
 
 static ICOM_VTABLE(IClassFactory) clfvt = 
 {
+    ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
     IClassFactory_fnQueryInterface,
     IClassFactory_fnAddRef,
   IClassFactory_fnRelease,
diff --git a/dlls/shell32/shlfolder.c b/dlls/shell32/shlfolder.c
index 7eaf94e02f5..1cb591c67c9 100644
--- a/dlls/shell32/shlfolder.c
+++ b/dlls/shell32/shlfolder.c
@@ -167,6 +167,7 @@ static HRESULT WINAPI ISFDropTarget_Drop(
 
 static struct ICOM_VTABLE(IDropTarget) dtvt = 
 {
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 	ISFDropTarget_QueryInterface,
 	ISFDropTarget_AddRef,
 	ISFDropTarget_Release,
@@ -965,7 +966,9 @@ static HRESULT WINAPI IShellFolder_fnGetFolderPath(IShellFolder * iface, LPSTR l
 }
 
 static ICOM_VTABLE(IShellFolder) sfvt = 
-{	IShellFolder_fnQueryInterface,
+{	
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
+	IShellFolder_fnQueryInterface,
 	IShellFolder_fnAddRef,
 	IShellFolder_fnRelease,
 	IShellFolder_fnParseDisplayName,
@@ -1067,6 +1070,7 @@ static HRESULT WINAPI ISFPersistFolder_Initialize(
 
 static ICOM_VTABLE(IPersistFolder) psfvt = 
 {
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 	ISFPersistFolder_QueryInterface,
 	ISFPersistFolder_AddRef,
 	ISFPersistFolder_Release,
diff --git a/dlls/shell32/shlview.c b/dlls/shell32/shlview.c
index 366c2305702..dc934a8ef18 100644
--- a/dlls/shell32/shlview.c
+++ b/dlls/shell32/shlview.c
@@ -1507,7 +1507,9 @@ static HRESULT WINAPI IShellView_fnGetItemObject(IShellView * iface, UINT uItem,
 }
 
 static struct ICOM_VTABLE(IShellView) svvt = 
-{	IShellView_fnQueryInterface,
+{	
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
+	IShellView_fnQueryInterface,
 	IShellView_fnAddRef,
 	IShellView_fnRelease,
 	IShellView_fnGetWindow,
@@ -1596,6 +1598,7 @@ static HRESULT WINAPI ISVOleCmdTarget_Exec(
 
 static ICOM_VTABLE(IOleCommandTarget) ctvt = 
 {
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 	ISVOleCmdTarget_QueryInterface,
 	ISVOleCmdTarget_AddRef,
 	ISVOleCmdTarget_Release,
@@ -1695,6 +1698,7 @@ static HRESULT WINAPI ISVDropTarget_Drop(
 
 static struct ICOM_VTABLE(IDropTarget) dtvt = 
 {
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 	ISVDropTarget_QueryInterface,
 	ISVDropTarget_AddRef,
 	ISVDropTarget_Release,
@@ -1833,6 +1837,7 @@ static HRESULT WINAPI ISVViewObject_GetAdvise(
 
 static struct ICOM_VTABLE(IViewObject) vovt = 
 {
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 	ISVViewObject_QueryInterface,
 	ISVViewObject_AddRef,
 	ISVViewObject_Release,
diff --git a/graphics/d3ddevices.c b/graphics/d3ddevices.c
index 35aafe71f21..d5c9c67b377 100644
--- a/graphics/d3ddevices.c
+++ b/graphics/d3ddevices.c
@@ -1157,7 +1157,9 @@ static HRESULT WINAPI IDirect3DDevice2Impl_GetClipStatus(LPDIRECT3DDEVICE2 iface
  *				OpenGL-specific VTable
  */
 
-static ICOM_VTABLE(IDirect3DDevice2) OpenGL_vtable = {
+static ICOM_VTABLE(IDirect3DDevice2) OpenGL_vtable = 
+{
+  ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
   IDirect3DDevice2Impl_QueryInterface,
   IDirect3DDevice2Impl_AddRef,
   IDirect3DDevice2Impl_Release,
@@ -1674,7 +1676,9 @@ static HRESULT WINAPI IDirect3DDeviceImpl_GetDirect3D(LPDIRECT3DDEVICE iface,
 /*******************************************************************************
  *				Direct3DDevice VTable
  */
-static ICOM_VTABLE(IDirect3DDevice) OpenGL_vtable_dx3 = {
+static ICOM_VTABLE(IDirect3DDevice) OpenGL_vtable_dx3 = 
+{
+  ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
   IDirect3DDeviceImpl_QueryInterface,
   IDirect3DDeviceImpl_AddRef,
   IDirect3DDeviceImpl_Release,
diff --git a/graphics/d3dexecutebuffer.c b/graphics/d3dexecutebuffer.c
index 7db3e23fcab..2bb00e0220e 100644
--- a/graphics/d3dexecutebuffer.c
+++ b/graphics/d3dexecutebuffer.c
@@ -843,7 +843,9 @@ static HRESULT WINAPI IDirect3DExecuteBufferImpl_Optimize(LPDIRECT3DEXECUTEBUFFE
 /*******************************************************************************
  *				IDirect3DLight VTable
  */
-static ICOM_VTABLE(IDirect3DExecuteBuffer) executebuffer_vtable = {
+static ICOM_VTABLE(IDirect3DExecuteBuffer) executebuffer_vtable = 
+{
+  ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
   /*** IUnknown methods ***/
   IDirect3DExecuteBufferImpl_QueryInterface,
   IDirect3DExecuteBufferImpl_AddRef,
diff --git a/graphics/d3dlight.c b/graphics/d3dlight.c
index 9006ea7ae1f..2ea2431067c 100644
--- a/graphics/d3dlight.c
+++ b/graphics/d3dlight.c
@@ -244,7 +244,9 @@ static HRESULT WINAPI IDirect3DLightImpl_Initialize(LPDIRECT3DLIGHT iface,
 /*******************************************************************************
  *				IDirect3DLight VTable
  */
-static ICOM_VTABLE(IDirect3DLight) light_vtable = {
+static ICOM_VTABLE(IDirect3DLight) light_vtable = 
+{
+  ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
   /*** IUnknown methods ***/
   IDirect3DLightImpl_QueryInterface,
   IDirect3DLightImpl_AddRef,
diff --git a/graphics/d3dmaterial.c b/graphics/d3dmaterial.c
index e01cb710f4a..37ca54f7377 100644
--- a/graphics/d3dmaterial.c
+++ b/graphics/d3dmaterial.c
@@ -220,7 +220,9 @@ static HRESULT WINAPI IDirect3DMaterialImpl_Initialize(LPDIRECT3DMATERIAL iface,
 /*******************************************************************************
  *				IDirect3DMaterial VTable
  */
-static ICOM_VTABLE(IDirect3DMaterial) material_vtable = {
+static ICOM_VTABLE(IDirect3DMaterial) material_vtable = 
+{
+  ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
   /*** IUnknown methods ***/
   IDirect3DMaterial2Impl_QueryInterface,
   IDirect3DMaterial2Impl_AddRef,
@@ -238,7 +240,9 @@ static ICOM_VTABLE(IDirect3DMaterial) material_vtable = {
 /*******************************************************************************
  *				IDirect3DMaterial2 VTable
  */
-static ICOM_VTABLE(IDirect3DMaterial2) material2_vtable = {
+static ICOM_VTABLE(IDirect3DMaterial2) material2_vtable = 
+{
+  ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
   /*** IUnknown methods ***/
   IDirect3DMaterial2Impl_QueryInterface,
   IDirect3DMaterial2Impl_AddRef,
diff --git a/graphics/d3dtexture.c b/graphics/d3dtexture.c
index 4f11891f016..be8192d7c57 100644
--- a/graphics/d3dtexture.c
+++ b/graphics/d3dtexture.c
@@ -528,7 +528,9 @@ static HRESULT WINAPI IDirect3DTexture2Impl_Load(LPDIRECT3DTEXTURE2 iface,
 /*******************************************************************************
  *				IDirect3DTexture2 VTable
  */
-static ICOM_VTABLE(IDirect3DTexture2) texture2_vtable = {
+static ICOM_VTABLE(IDirect3DTexture2) texture2_vtable = 
+{
+  ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
   /*** IUnknown methods ***/
   IDirect3DTexture2Impl_QueryInterface,
   IDirect3DTexture2Impl_AddRef,
@@ -542,7 +544,9 @@ static ICOM_VTABLE(IDirect3DTexture2) texture2_vtable = {
 /*******************************************************************************
  *				IDirect3DTexture VTable
  */
-static ICOM_VTABLE(IDirect3DTexture) texture_vtable = {
+static ICOM_VTABLE(IDirect3DTexture) texture_vtable = 
+{
+  ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
   /*** IUnknown methods ***/
   IDirect3DTexture2Impl_QueryInterface,
   IDirect3DTexture2Impl_AddRef,
diff --git a/graphics/d3dviewport.c b/graphics/d3dviewport.c
index f11cefebf66..2746b540865 100644
--- a/graphics/d3dviewport.c
+++ b/graphics/d3dviewport.c
@@ -348,7 +348,9 @@ static HRESULT WINAPI IDirect3DViewport2Impl_SetViewport2(LPDIRECT3DVIEWPORT2 if
 /*******************************************************************************
  *				IDirect3DViewport1/2 VTable
  */
-static ICOM_VTABLE(IDirect3DViewport2) viewport2_vtable = {
+static ICOM_VTABLE(IDirect3DViewport2) viewport2_vtable = 
+{
+  ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
   /*** IUnknown methods ***/
   IDirect3DViewport2Impl_QueryInterface,
   IDirect3DViewport2Impl_AddRef,
diff --git a/graphics/ddraw.c b/graphics/ddraw.c
index 28eb30e822f..a226f11542a 100644
--- a/graphics/ddraw.c
+++ b/graphics/ddraw.c
@@ -1791,7 +1791,9 @@ static HRESULT WINAPI IDirectDrawSurface4Impl_ChangeUniquenessValue(LPDIRECTDRAW
   return DD_OK;
 }
 
-static ICOM_VTABLE(IDirectDrawSurface4) dga_dds4vt = {
+static ICOM_VTABLE(IDirectDrawSurface4) dga_dds4vt = 
+{
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 	IDirectDrawSurface4Impl_QueryInterface,
 	IDirectDrawSurface4Impl_AddRef,
 	DGA_IDirectDrawSurface4Impl_Release,
@@ -1839,7 +1841,9 @@ static ICOM_VTABLE(IDirectDrawSurface4) dga_dds4vt = {
 	IDirectDrawSurface4Impl_ChangeUniquenessValue
 };
 
-static ICOM_VTABLE(IDirectDrawSurface4) xlib_dds4vt = {
+static ICOM_VTABLE(IDirectDrawSurface4) xlib_dds4vt = 
+{
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 	IDirectDrawSurface4Impl_QueryInterface,
 	IDirectDrawSurface4Impl_AddRef,
 	Xlib_IDirectDrawSurface4Impl_Release,
@@ -1988,7 +1992,9 @@ static HRESULT WINAPI IDirectDrawClipperImpl_IsClipListChanged(
    return DD_OK;
 }
 
-static ICOM_VTABLE(IDirectDrawClipper) ddclipvt = {
+static ICOM_VTABLE(IDirectDrawClipper) ddclipvt = 
+{
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
         IDirectDrawClipperImpl_QueryInterface,
         IDirectDrawClipperImpl_AddRef,
         IDirectDrawClipperImpl_Release,
@@ -2155,7 +2161,9 @@ static HRESULT WINAPI IDirectDrawPaletteImpl_QueryInterface(
   return S_OK;
 }
 
-static ICOM_VTABLE(IDirectDrawPalette) dga_ddpalvt = {
+static ICOM_VTABLE(IDirectDrawPalette) dga_ddpalvt = 
+{
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 	IDirectDrawPaletteImpl_QueryInterface,
 	IDirectDrawPaletteImpl_AddRef,
 	IDirectDrawPaletteImpl_Release,
@@ -2165,7 +2173,9 @@ static ICOM_VTABLE(IDirectDrawPalette) dga_ddpalvt = {
 	DGA_IDirectDrawPaletteImpl_SetEntries
 };
 
-static ICOM_VTABLE(IDirectDrawPalette) xlib_ddpalvt = {
+static ICOM_VTABLE(IDirectDrawPalette) xlib_ddpalvt = 
+{
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 	IDirectDrawPaletteImpl_QueryInterface,
 	IDirectDrawPaletteImpl_AddRef,
 	IDirectDrawPaletteImpl_Release,
@@ -2319,7 +2329,9 @@ static HRESULT WINAPI IDirect3DImpl_FindDevice(LPDIRECT3D iface,
   return DD_OK;
 }
 
-static ICOM_VTABLE(IDirect3D) d3dvt = {
+static ICOM_VTABLE(IDirect3D) d3dvt = 
+{
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
         IDirect3DImpl_QueryInterface,
         IDirect3DImpl_AddRef,
         IDirect3DImpl_Release,
@@ -2480,7 +2492,9 @@ static HRESULT WINAPI IDirect3D2Impl_CreateDevice(LPDIRECT3D2 iface,
   return DDERR_INVALIDPARAMS;
 }
 
-static ICOM_VTABLE(IDirect3D2) d3d2vt = {
+static ICOM_VTABLE(IDirect3D2) d3d2vt = 
+{
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 	IDirect3D2Impl_QueryInterface,
 	IDirect3D2Impl_AddRef,
         IDirect3D2Impl_Release,
@@ -4098,7 +4112,9 @@ static HRESULT WINAPI IDirectDraw2Impl_Initialize(LPDIRECTDRAW2 iface,
 # define XCAST(fun)	(void *)
 #endif
 
-static ICOM_VTABLE(IDirectDraw) dga_ddvt = {
+static ICOM_VTABLE(IDirectDraw) dga_ddvt = 
+{
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 	XCAST(QueryInterface)DGA_IDirectDraw2Impl_QueryInterface,
 	XCAST(AddRef)IDirectDraw2Impl_AddRef,
 	XCAST(Release)DGA_IDirectDraw2Impl_Release,
@@ -4124,7 +4140,9 @@ static ICOM_VTABLE(IDirectDraw) dga_ddvt = {
 	XCAST(WaitForVerticalBlank)IDirectDraw2Impl_WaitForVerticalBlank,
 };
 
-static ICOM_VTABLE(IDirectDraw) xlib_ddvt = {
+static ICOM_VTABLE(IDirectDraw) xlib_ddvt = 
+{
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 	XCAST(QueryInterface)Xlib_IDirectDraw2Impl_QueryInterface,
 	XCAST(AddRef)IDirectDraw2Impl_AddRef,
 	XCAST(Release)Xlib_IDirectDraw2Impl_Release,
@@ -4194,7 +4212,9 @@ static HRESULT WINAPI Xlib_IDirectDraw2Impl_GetAvailableVidMem(
 	return DD_OK;
 }
 
-static ICOM_VTABLE(IDirectDraw2) dga_dd2vt = {
+static ICOM_VTABLE(IDirectDraw2) dga_dd2vt = 
+{
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 	DGA_IDirectDraw2Impl_QueryInterface,
 	IDirectDraw2Impl_AddRef,
 	DGA_IDirectDraw2Impl_Release,
@@ -4221,7 +4241,9 @@ static ICOM_VTABLE(IDirectDraw2) dga_dd2vt = {
 	DGA_IDirectDraw2Impl_GetAvailableVidMem
 };
 
-static ICOM_VTABLE(IDirectDraw2) xlib_dd2vt = {
+static ICOM_VTABLE(IDirectDraw2) xlib_dd2vt = 
+{
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 	Xlib_IDirectDraw2Impl_QueryInterface,
 	IDirectDraw2Impl_AddRef,
 	Xlib_IDirectDraw2Impl_Release,
@@ -4292,7 +4314,9 @@ static HRESULT WINAPI IDirectDraw4Impl_GetDeviceIdentifier(LPDIRECTDRAW4 iface,
 #endif
 
 
-static ICOM_VTABLE(IDirectDraw4) dga_dd4vt = {
+static ICOM_VTABLE(IDirectDraw4) dga_dd4vt = 
+{
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 	XCAST(QueryInterface)DGA_IDirectDraw2Impl_QueryInterface,
 	XCAST(AddRef)IDirectDraw2Impl_AddRef,
 	XCAST(Release)DGA_IDirectDraw2Impl_Release,
@@ -4323,7 +4347,9 @@ static ICOM_VTABLE(IDirectDraw4) dga_dd4vt = {
 	IDirectDraw4Impl_GetDeviceIdentifier
 };
 
-static ICOM_VTABLE(IDirectDraw4) xlib_dd4vt = {
+static ICOM_VTABLE(IDirectDraw4) xlib_dd4vt = 
+{
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 	XCAST(QueryInterface)Xlib_IDirectDraw2Impl_QueryInterface,
 	XCAST(AddRef)IDirectDraw2Impl_AddRef,
 	XCAST(Release)Xlib_IDirectDraw2Impl_Release,
@@ -4719,7 +4745,9 @@ static HRESULT WINAPI DDCF_LockServer(LPCLASSFACTORY iface,BOOL dolock) {
 	return S_OK;
 }
 
-static ICOM_VTABLE(IClassFactory) DDCF_Vtbl = {
+static ICOM_VTABLE(IClassFactory) DDCF_Vtbl = 
+{
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 	DDCF_QueryInterface,
 	DDCF_AddRef,
 	DDCF_Release,
diff --git a/include/wine/obj_base.h b/include/wine/obj_base.h
index 595dc76ef6a..d09a0d18af3 100644
--- a/include/wine/obj_base.h
+++ b/include/wine/obj_base.h
@@ -6,6 +6,21 @@
 #ifndef __WINE_WINE_OBJ_BASE_H
 #define __WINE_WINE_OBJ_BASE_H
 
+/*****************************************************************************
+ * define ICOM_MSVTABLE_COMPAT
+ * to implement the microsoft com vtable compatibility workaround for g++.
+ *
+ * NOTE: Turning this option on will produce a winelib that is incompatible
+ * with the binary emulator.
+ *
+ * If the compiler supports the com_interface attribute, leave this off, and
+ * define the ICOM_USE_COM_INTERFACE_ATTRIBUTE macro below.
+ *
+ * If you aren't interested in WineLib C++ compatability at all, leave both
+ * options off.
+ */
+/* #define ICOM_MSVTABLE_COMPAT 1 */
+/* #define ICOM_USE_COM_INTERFACE_ATTRIBUTE 1 */
 
 /*****************************************************************************
  * Defines the basic types
@@ -13,6 +28,9 @@
 #include "wtypes.h"
 
 
+#define LISet32(li, v)   ((li).HighPart = (v) < 0 ? -1 : 0, (li).LowPart = (v))
+#define ULISet32(li, v)  ((li).HighPart = 0, (li).LowPart = (v))
+
 /*****************************************************************************
  * Macros to declare the GUIDs
  */
@@ -312,302 +330,139 @@ inline BOOL operator!=(const GUID& guidOne, const GUID& guidOther)
 #ifndef ICOM_CINTERFACE
 /* C++ interface */
 
-#ifndef ICOM_VIRTUAL_METHODS
-/* Uses these macros, i.e. do not define ICOM_VIRTUAL_METHODS, if your C++ compiler does not generate 
- * virtual tables with the right layout (i.e. currently most g++ derivatives).
- */
-
 #define ICOM_METHOD(ret,xfn) \
-    private: ret (CALLBACK *fn##xfn)(ICOM_INTERFACE* me); \
-    public: inline ret (CALLBACK xfn)(void) { return ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this); };
+     public: virtual ret (CALLBACK xfn)(void) = 0;
 
 #define ICOM_METHOD1(ret,xfn,ta,na) \
-    private: ret (CALLBACK *fn##xfn)(ICOM_INTERFACE* me,ta a); \
-    public: inline ret (CALLBACK xfn)(ta a) { return ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this,a); };
+     public: virtual ret (CALLBACK xfn)(ta a) = 0;
 
 #define ICOM_METHOD2(ret,xfn,ta,na,tb,nb) \
-    private: ret (CALLBACK *fn##xfn)(ICOM_INTERFACE* me,ta a,tb b); \
-    public: inline ret (CALLBACK xfn)(ta a,tb b) { return ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this,a,b); };
+     public: virtual ret (CALLBACK xfn)(ta a,tb b) = 0;
 
 #define ICOM_METHOD3(ret,xfn,ta,na,tb,nb,tc,nc) \
-    private: ret (CALLBACK *fn##xfn)(ICOM_INTERFACE* me,ta a,tb b,tc c); \
-    public: inline ret (CALLBACK xfn)(ta a,tb b,tc c) { return ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this,a,b,c); };
+     public: virtual ret (CALLBACK xfn)(ta a,tb b,tc c) = 0;
 
 #define ICOM_METHOD4(ret,xfn,ta,na,tb,nb,tc,nc,td,nd) \
-    private: ret (CALLBACK *fn##xfn)(ICOM_INTERFACE* me,ta a,tb b,tc c,td d); \
-    public: inline ret (CALLBACK xfn)(ta a,tb b,tc c,td d) { return ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this,a,b,c,d); };
+     public: virtual ret (CALLBACK xfn)(ta a,tb b,tc c,td d) = 0;
 
 #define ICOM_METHOD5(ret,xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne) \
-    private: ret (CALLBACK *fn##xfn)(ICOM_INTERFACE* me,ta a,tb b,tc c,td d,te e); \
-    public: inline ret (CALLBACK xfn)(ta a,tb b,tc c,td d,te e) { return ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this,a,b,c,d,e); };
+     public: virtual ret (CALLBACK xfn)(ta a,tb b,tc c,td d,te e) = 0;
 
 #define ICOM_METHOD6(ret,xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne,tf,nf) \
-    private: ret (CALLBACK *fn##xfn)(ICOM_INTERFACE* me,ta a,tb b,tc c,td d,te e,tf f); \
-    public: inline ret (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f) { return ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this,a,b,c,d,e,f); };
+     public: virtual ret (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f) = 0;
 
 #define ICOM_METHOD7(ret,xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne,tf,nf,tg,ng) \
-    private: ret (CALLBACK *fn##xfn)(ICOM_INTERFACE* me,ta a,tb b,tc c,td d,te e,tf f,tg g); \
-    public: inline ret (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f,tg g) { return ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this,a,b,c,d,e,f,g); };
+     public: virtual ret (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f,tg g) = 0;
 
 #define ICOM_METHOD8(ret,xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne,tf,nf,tg,ng,th,nh) \
-    private: ret (CALLBACK *fn##xfn)(ICOM_INTERFACE* me,ta a,tb b,tc c,td d,te e,tf f,tg g,th h); \
-    public: inline ret (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f,tg g,th h) { return ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this,a,b,c,d,e,f,g,h); };
+     public: virtual ret (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f,tg g,th h) = 0;
 
 #define ICOM_METHOD9(ret,xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne,tf,nf,tg,ng,th,nh,ti,ni) \
-    private: ret (CALLBACK *fn##xfn)(ICOM_INTERFACE* me,ta a,tb b,tc c,td d,te e,tf f,tg g,th h,ti i); \
-    public: inline ret (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f,tg g,th h,ti i) { return ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this,a,b,c,d,e,f,g,h,i); };
+     public: virtual ret (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f,tg g,th h,ti i) = 0;
 
 #define ICOM_METHOD10(ret,xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne,tf,nf,tg,ng,th,nh,ti,ni,tj,nj) \
-    private: ret (CALLBACK *fn##xfn)(ICOM_INTERFACE* me,ta a,tb b,tc c,td d,te e,tf f,tg g,th h,ti i,tj j); \
-    public: inline ret (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f,tg g,th h,ti i,tj j) { return ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this,a,b,c,d,e,f,g,h,i,j); };
+     public: virtual ret (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f,tg g,th h,ti i,tj j) = 0;
 
 
 #define ICOM_CMETHOD(ret,xfn) \
-    private: ret (CALLBACK *fn##xfn)(const ICOM_INTERFACE* me); \
-    public: inline ret (CALLBACK xfn)(void) const { return ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this); };
+     public: virtual ret (CALLBACK xfn)(void) const = 0;
 
 #define ICOM_CMETHOD1(ret,xfn,ta,na) \
-    private: ret (CALLBACK *fn##xfn)(const ICOM_INTERFACE* me,ta a); \
-    public: inline ret (CALLBACK xfn)(ta a) const { return ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this,a); };
+     public: virtual ret (CALLBACK xfn)(ta a) const = 0;
 
 #define ICOM_CMETHOD2(ret,xfn,ta,na,tb,nb) \
-    private: ret (CALLBACK *fn##xfn)(const ICOM_INTERFACE* me,ta a,tb b); \
-    public: inline ret (CALLBACK xfn)(ta a,tb b) const { return ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this,a,b); };
+     public: virtual ret (CALLBACK xfn)(ta a,tb b) const = 0;
 
 #define ICOM_CMETHOD3(ret,xfn,ta,na,tb,nb,tc,nc) \
-    private: ret (CALLBACK *fn##xfn)(const ICOM_INTERFACE* me,ta a,tb b,tc c); \
-    public: inline ret (CALLBACK xfn)(ta a,tb b,tc c) const { return ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this,a,b,c); };
+     public: virtual ret (CALLBACK xfn)(ta a,tb b,tc c) const = 0;
 
 #define ICOM_CMETHOD4(ret,xfn,ta,na,tb,nb,tc,nc,td,nd) \
-    private: ret (CALLBACK *fn##xfn)(const ICOM_INTERFACE* me,ta a,tb b,tc c,td d); \
-    public: inline ret (CALLBACK xfn)(ta a,tb b,tc c,td d) const { return ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this,a,b,c,d); };
+     public: virtual ret (CALLBACK xfn)(ta a,tb b,tc c,td d) const = 0;
 
 #define ICOM_CMETHOD5(ret,xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne) \
-    private: ret (CALLBACK *fn##xfn)(const ICOM_INTERFACE* me,ta a,tb b,tc c,td d,te e); \
-    public: inline ret (CALLBACK xfn)(ta a,tb b,tc c,td d,te e) const { return ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this,a,b,c,d,e); };
+     public: virtual ret (CALLBACK xfn)(ta a,tb b,tc c,td d,te e) const = 0;
 
 #define ICOM_CMETHOD6(ret,xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne,tf,nf) \
-    private: ret (CALLBACK *fn##xfn)(const ICOM_INTERFACE* me,ta a,tb b,tc c,td d,te e,tf f); \
-    public: inline ret (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f) const { return ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this,a,b,c,d,e,f); };
+     public: virtual ret (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f) const = 0;
 
 #define ICOM_CMETHOD7(ret,xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne,tf,nf,tg,ng) \
-    private: ret (CALLBACK *fn##xfn)(const ICOM_INTERFACE* me,ta a,tb b,tc c,td d,te e,tf f,tg g); \
-    public: inline ret (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f,tg g) const { return ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this,a,b,c,d,e,f,g); };
+     public: virtual ret (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f,tg g) const = 0;
 
 #define ICOM_CMETHOD8(ret,xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne,tf,nf,tg,ng,th,nh) \
-    private: ret (CALLBACK *fn##xfn)(const ICOM_INTERFACE* me,ta a,tb b,tc c,td d,te e,tf f,tg g,th h); \
-    public: inline ret (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f,tg g,th h) const { return ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this,a,b,c,d,e,f,g,h); };
+     public: virtual ret (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f,tg g,th h) const = 0;
 
 
 #define ICOM_VMETHOD(xfn) \
-    private: void (CALLBACK *fn##xfn)(ICOM_INTERFACE* me); \
-    public: inline void (CALLBACK xfn)(void) { ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this); };
+     public: virtual void (CALLBACK xfn)(void) = 0;
 
 #define ICOM_VMETHOD1(xfn,ta,na) \
-    private: void (CALLBACK *fn##xfn)(ICOM_INTERFACE* me,ta a); \
-    public: inline void (CALLBACK xfn)(ta a) { ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this,a); };
+     public: virtual void (CALLBACK xfn)(ta a) = 0;
 
 #define ICOM_VMETHOD2(xfn,ta,na,tb,nb) \
-    private: void (CALLBACK *fn##xfn)(ICOM_INTERFACE* me,ta a,tb b); \
-    public: inline void (CALLBACK xfn)(ta a,tb b) { ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this,a,b); };
+     public: virtual void (CALLBACK xfn)(ta a,tb b) = 0;
 
 #define ICOM_VMETHOD3(xfn,ta,na,tb,nb,tc,nc) \
-    private: void (CALLBACK *fn##xfn)(ICOM_INTERFACE* me,ta a,tb b,tc c); \
-    public: inline void (CALLBACK xfn)(ta a,tb b,tc c) { ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this,a,b,c); };
+     public: virtual void (CALLBACK xfn)(ta a,tb b,tc c) = 0;
 
 #define ICOM_VMETHOD4(xfn,ta,na,tb,nb,tc,nc,td,nd) \
-    private: void (CALLBACK *fn##xfn)(ICOM_INTERFACE* me,ta a,tb b,tc c,td d); \
-    public: inline void (CALLBACK xfn)(ta a,tb b,tc c,td d) { ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this,a,b,c,d); };
+     public: virtual void (CALLBACK xfn)(ta a,tb b,tc c,td d) = 0;
 
 #define ICOM_VMETHOD5(xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne) \
-    private: void (CALLBACK *fn##xfn)(ICOM_INTERFACE* me,ta a,tb b,tc c,td d,te e); \
-    public: inline void (CALLBACK xfn)(ta a,tb b,tc c,td d,te e) { ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this,a,b,c,d,e); };
+     public: virtual void (CALLBACK xfn)(ta a,tb b,tc c,td d,te e) = 0;
 
 #define ICOM_VMETHOD6(xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne,tf,nf) \
-    private: void (CALLBACK *fn##xfn)(ICOM_INTERFACE* me,ta a,tb b,tc c,td d,te e,tf f); \
-    public: inline void (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f) { ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this,a,b,c,d,e,f); };
+     public: virtual void (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f) = 0;
 
 #define ICOM_VMETHOD7(xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne,tf,nf,tg,ng) \
-    private: void (CALLBACK *fn##xfn)(ICOM_INTERFACE* me,ta a,tb b,tc c,td d,te e,tf f,tg g); \
-    public: inline void (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f,tg g) { ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this,a,b,c,d,e,f,g); };
+     public: virtual void (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f,tg g) = 0;
 
 #define ICOM_VMETHOD8(xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne,tf,nf,tg,ng,th,nh) \
-    private: void (CALLBACK *fn##xfn)(ICOM_INTERFACE* me,ta a,tb b,tc c,td d,te e,tf f,tg g,th h); \
-    public: inline void (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f,tg g,th h) { ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this,a,b,c,d,e,f,g,h); };
+     public: virtual void (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f,tg g,th h) = 0;
 
 
 #define ICOM_CVMETHOD(xfn) \
-    private: void (CALLBACK *fn##xfn)(const ICOM_INTERFACE* me); \
-    public: inline void (CALLBACK xfn)(void) const { ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this); };
+     public: virtual void (CALLBACK xfn)(void) const = 0;
 
 #define ICOM_CVMETHOD1(xfn,ta,na) \
-    private: void (CALLBACK *fn##xfn)(const ICOM_INTERFACE* me,ta a); \
-    public: inline void (CALLBACK xfn)(ta a) const { ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this,a); };
+     public: virtual void (CALLBACK xfn)(ta a) const = 0;
 
 #define ICOM_CVMETHOD2(xfn,ta,na,tb,nb) \
-    private: void (CALLBACK *fn##xfn)(const ICOM_INTERFACE* me,ta a,tb b); \
-    public: inline void (CALLBACK xfn)(ta a,tb b) const { ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this,a,b); };
+     public: virtual void (CALLBACK xfn)(ta a,tb b) const = 0;
 
 #define ICOM_CVMETHOD3(xfn,ta,na,tb,nb,tc,nc) \
-    private: void (CALLBACK *fn##xfn)(const ICOM_INTERFACE* me,ta a,tb b,tc c); \
-    public: inline void (CALLBACK xfn)(ta a,tb b,tc c) const { ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this,a,b,c); };
+     public: virtual void (CALLBACK xfn)(ta a,tb b,tc c) const = 0;
 
 #define ICOM_CVMETHOD4(xfn,ta,na,tb,nb,tc,nc,td,nd) \
-    private: void (CALLBACK *fn##xfn)(const ICOM_INTERFACE* me,ta a,tb b,tc c,td d); \
-    public: inline void (CALLBACK xfn)(ta a,tb b,tc c,td d) const { ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this,a,b,c,d); };
+     public: virtual void (CALLBACK xfn)(ta a,tb b,tc c,td d) const = 0;
 
 #define ICOM_CVMETHOD5(xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne) \
-    private: void (CALLBACK *fn##xfn)(const ICOM_INTERFACE* me,ta a,tb b,tc c,td d,te e); \
-    public: inline void (CALLBACK xfn)(ta a,tb b,tc c,td d,te e) const { ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this,a,b,c,d,e); };
+     public: virtual void (CALLBACK xfn)(ta a,tb b,tc c,td d,te e) const = 0;
 
 #define ICOM_CVMETHOD6(xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne,tf,nf) \
-    private: void (CALLBACK *fn##xfn)(const ICOM_INTERFACE* me,ta a,tb b,tc c,td d,te e,tf f); \
-    public: inline void (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f) const { ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this,a,b,c,d,e,f); };
+     public: virtual void (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f) const = 0;
 
 #define ICOM_CVMETHOD7(xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne,tf,nf,tg,ng) \
-    private: void (CALLBACK *fn##xfn)(const ICOM_INTERFACE* me,ta a,tb b,tc c,td d,te e,tf f,tg g); \
-    public: inline void (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f,tg g) const { ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this,a,b,c,d,e,f,g); };
+     public: virtual void (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f,tg g) const = 0;
 
 #define ICOM_CVMETHOD8(xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne,tf,nf,tg,ng,th,nh) \
-    private: void (CALLBACK *fn##xfn)(const ICOM_INTERFACE* me,ta a,tb b,tc c,td d,te e,tf f,tg g,th h); \
-    public: inline void (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f,tg g,th h) const { ((ICOM_INTERFACE*)t.lpvtbl)->fn##xfn(this,a,b,c,d,e,f,g,h); };
+     public: virtual void (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f,tg g,th h) const = 0;
 
+#ifdef ICOM_USE_COM_INTERFACE_ATTRIBUTE
 
 #define ICOM_DEFINE(iface,ibase) \
     typedef struct iface: public ibase { \
         iface##_METHODS \
-    };
+            } __attribute__ ((com_interface));
 
 #else
-/* This case can be used if the layout of the virtual tables generated by the C++ 
- * compiler matches that of Visual C++.
- */
-
-#define ICOM_METHOD(ret,xfn) \
-    virtual ret (CALLBACK xfn)(void) = 0;
-
-#define ICOM_METHOD1(ret,xfn,ta,na) \
-    virtual ret (CALLBACK xfn)(ta a) = 0;
-
-#define ICOM_METHOD2(ret,xfn,ta,na,tb,nb) \
-    virtual ret (CALLBACK xfn)(ta a,tb b) = 0;
-
-#define ICOM_METHOD3(ret,xfn,ta,na,tb,nb,tc,nc) \
-    virtual ret (CALLBACK xfn)(ta a,tb b,tc c) = 0;
-
-#define ICOM_METHOD4(ret,xfn,ta,na,tb,nb,tc,nc,td,nd) \
-    virtual ret (CALLBACK xfn)(ta a,tb b,tc c,td d) = 0;
-
-#define ICOM_METHOD5(ret,xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne) \
-    virtual ret (CALLBACK xfn)(ta a,tb b,tc c,td d,te e) = 0;
-
-#define ICOM_METHOD6(ret,xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne,tf,nf) \
-    virtual ret (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f) = 0;
-
-#define ICOM_METHOD7(ret,xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne,tf,nf,tg,ng) \
-    virtual ret (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f,tg g) = 0;
-
-#define ICOM_METHOD8(ret,xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne,tf,nf,tg,ng,th,nh) \
-    virtual ret (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f,tg g,th h) = 0;
-
-#define ICOM_METHOD9(ret,xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne,tf,nf,tg,ng,th,nh,ti,ni) \
-    virtual ret (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f,tg g,th h,ti i) = 0;
-
-#define ICOM_METHOD10(ret,xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne,tf,nf,tg,ng,th,nh,ti,ni,tj,nj) \
-    virtual ret (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f,tg g,th h,ti i,tj j) = 0;
-
-
-#define ICOM_CMETHOD(ret,xfn) \
-    virtual ret (CALLBACK xfn)(void) const = 0;
-
-#define ICOM_CMETHOD1(ret,xfn,ta,na) \
-    virtual ret (CALLBACK xfn)(ta a) const = 0;
-
-#define ICOM_CMETHOD2(ret,xfn,ta,na,tb,nb) \
-    virtual ret (CALLBACK xfn)(ta a,tb b) const = 0;
-
-#define ICOM_CMETHOD3(ret,xfn,ta,na,tb,nb,tc,nc) \
-    virtual ret (CALLBACK xfn)(ta a,tb b,tc c) const = 0;
-
-#define ICOM_CMETHOD4(ret,xfn,ta,na,tb,nb,tc,nc,td,nd) \
-    virtual ret (CALLBACK xfn)(ta a,tb b,tc c,td d) const = 0;
-
-#define ICOM_CMETHOD5(ret,xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne) \
-    virtual ret (CALLBACK xfn)(ta a,tb b,tc c,td d,te e) const = 0;
-
-#define ICOM_CMETHOD6(ret,xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne,tf,nf) \
-    virtual ret (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f) const = 0;
-
-#define ICOM_CMETHOD7(ret,xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne,tf,nf,tg,ng) \
-    virtual ret (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f,tg g) const = 0;
-
-#define ICOM_CMETHOD8(ret,xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne,tf,nf,tg,ng,th,nh) \
-    virtual ret (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f,tg g,th h) const = 0;
-
-
-#define ICOM_VMETHOD(xfn) \
-    virtual void (CALLBACK xfn)(void) = 0;
-
-#define ICOM_VMETHOD1(xfn,ta,na) \
-    virtual void (CALLBACK xfn)(ta a) = 0;
-
-#define ICOM_VMETHOD2(xfn,ta,na,tb,nb) \
-    virtual void (CALLBACK xfn)(ta a,tb b) = 0;
-
-#define ICOM_VMETHOD3(xfn,ta,na,tb,nb,tc,nc) \
-    virtual void (CALLBACK xfn)(ta a,tb b,tc c) = 0;
-
-#define ICOM_VMETHOD4(xfn,ta,na,tb,nb,tc,nc,td,nd) \
-    virtual void (CALLBACK xfn)(ta a,tb b,tc c,td d) = 0;
-
-#define ICOM_VMETHOD5(xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne) \
-    virtual void (CALLBACK xfn)(ta a,tb b,tc c,td d,te e) = 0;
-
-#define ICOM_VMETHOD6(xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne,tf,nf) \
-    virtual void (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f) = 0;
-
-#define ICOM_VMETHOD7(xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne,tf,nf,tg,ng) \
-    virtual void (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f,tg g) = 0;
-
-#define ICOM_VMETHOD8(xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne,tf,nf,tg,ng,th,nh) \
-    virtual void (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f,tg g,th h) = 0;
-
-
-#define ICOM_CVMETHOD(xfn) \
-    virtual void (CALLBACK xfn)(void) const = 0;
-
-#define ICOM_CVMETHOD1(xfn,ta,na) \
-    virtual void (CALLBACK xfn)(ta a) const = 0;
-
-#define ICOM_CVMETHOD2(xfn,ta,na,tb,nb) \
-    virtual void (CALLBACK xfn)(ta a,tb b) const = 0;
-
-#define ICOM_CVMETHOD3(xfn,ta,na,tb,nb,tc,nc) \
-    virtual void (CALLBACK xfn)(ta a,tb b,tc c) const = 0;
-
-#define ICOM_CVMETHOD4(xfn,ta,na,tb,nb,tc,nc,td,nd) \
-    virtual void (CALLBACK xfn)(ta a,tb b,tc c,td d) const = 0;
-
-#define ICOM_CVMETHOD5(xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne) \
-    virtual void (CALLBACK xfn)(ta a,tb b,tc c,td d,te e) const = 0;
-
-#define ICOM_CVMETHOD6(xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne,tf,nf) \
-    virtual void (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f) const = 0;
-
-#define ICOM_CVMETHOD7(xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne,tf,nf,tg,ng) \
-    virtual void (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f,tg g) const = 0;
-
-#define ICOM_CVMETHOD8(xfn,ta,na,tb,nb,tc,nc,td,nd,te,ne,tf,nf,tg,ng,th,nh) \
-    virtual void (CALLBACK xfn)(ta a,tb b,tc c,td d,te e,tf f,tg g,th h) const = 0;
-
-#endif
-
 
 #define ICOM_DEFINE(iface,ibase) \
     typedef struct iface: public ibase { \
         iface##_METHODS \
     };
 
+#endif /* ICOM_USE_COM_INTERFACE_ATTRIBUTE */
+
 #define ICOM_CALL(xfn, p)                        this_is_a_syntax_error
 #define ICOM_CALL1(xfn, p,a)                     this_is_a_syntax_error
 #define ICOM_CALL2(xfn, p,a,b)                   this_is_a_syntax_error
@@ -741,6 +596,21 @@ inline BOOL operator!=(const GUID& guidOne, const GUID& guidOther)
     void (CALLBACK *fn##xfn)(const ICOM_INTERFACE* me,ta a,tb b,tc c,td d,te e,tf f,tg g,th h);
 
 
+#ifdef ICOM_MSVTABLE_COMPAT
+#define ICOM_DEFINE(iface,ibase) \
+    typedef struct ICOM_VTABLE(iface) ICOM_VTABLE(iface); \
+    struct iface { \
+        const ICOM_VTABLE(iface)* lpvtbl; \
+    }; \
+    struct ICOM_VTABLE(iface) { \
+        long dummyRTTI1; \
+        long dummyRTTI2; \
+        ibase##_IMETHODS \
+        iface##_METHODS \
+    };
+#define ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE 0,0,
+
+#else
 #define ICOM_DEFINE(iface,ibase) \
     typedef struct ICOM_VTABLE(iface) ICOM_VTABLE(iface); \
     struct iface { \
@@ -750,6 +620,8 @@ inline BOOL operator!=(const GUID& guidOne, const GUID& guidOther)
         ibase##_IMETHODS \
         iface##_METHODS \
     };
+#define ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
+#endif /* ICOM_MSVTABLE_COMPAT */
 
 
 #define ICOM_CALL(xfn, p)  (p)->lpvtbl->fn##xfn(p)
@@ -761,6 +633,7 @@ inline BOOL operator!=(const GUID& guidOne, const GUID& guidOther)
 #define ICOM_CALL6(xfn, p,a,b,c,d,e,f) (p)->lpvtbl->fn##xfn(p,a,b,c,d,e,f)
 #define ICOM_CALL7(xfn, p,a,b,c,d,e,f,g) (p)->lpvtbl->fn##xfn(p,a,b,c,d,e,f,g)
 #define ICOM_CALL8(xfn, p,a,b,c,d,e,f,g,h) (p)->lpvtbl->fn##xfn(p,a,b,c,d,e,f,g,h)
+#define ICOM_CALL9(xfn, p,a,b,c,d,e,f,g,h,i) (p)->lpvtbl->fn##xfn(p,a,b,c,d,e,f,g,h,i)
 #define ICOM_CALL10(xfn, p,a,b,c,d,e,f,g,h,i,j) (p)->lpvtbl->fn##xfn(p,a,b,c,d,e,f,g,h,i,j)
 
 
@@ -797,22 +670,21 @@ typedef struct ICOM_VTABLE(IUnknown) ICOM_VTABLE(IUnknown);
 struct IUnknown {
     ICOM_VTABLE(IUnknown)* lpvtbl;
 };
+
 struct ICOM_VTABLE(IUnknown) {
-    ICOM_METHOD2(HRESULT,QueryInterface,REFIID,riid, LPVOID*,ppvObj)
+#ifdef ICOM_MSVTABLE_COMPAT
+    long dummyRTTI1;
+    long dummyRTTI2;
+#endif /* ICOM_MSVTABLE_COMPAT */
+
 #else /* ICOM_CINTERFACE */
 struct IUnknown {
-#ifndef ICOM_VIRTUAL_METHODS
-    union {
-        const void* lpvtbl;
-        HRESULT (CALLBACK *fnQueryInterface)(IUnknown* me, REFIID riid, LPVOID* ppvObj);
-    } t;
-    inline int QueryInterface(REFIID a, LPVOID* b) { return ((IUnknown*)t.lpvtbl)->t.fnQueryInterface(this,a,b); }
-#else /* ICOM_VIRTUAL_METHODS */
-    ICOM_METHOD2(HRESULT,QueryInterface,REFIID,riid, LPVOID*,ppvObj)
-#endif /* ICOM_VIRTUAL_METHODS */
+
 #endif /* ICOM_CINTERFACE */
-    ICOM_METHOD (ULONG,AddRef)
-    ICOM_METHOD (ULONG,Release)
+
+    ICOM_METHOD2(HRESULT,QueryInterface,REFIID,riid, LPVOID*,ppvObj);
+    ICOM_METHOD (ULONG,AddRef);
+    ICOM_METHOD (ULONG,Release);
 };
 #undef ICOM_INTERFACE
 
@@ -823,7 +695,6 @@ struct IUnknown {
 #define IUnknown_Release(p)            ICOM_CALL (Release,p)
 #endif
 
-
 /*****************************************************************************
  * IClassFactory interface
  */
@@ -906,21 +777,6 @@ ICOM_DEFINE(IMalloc,IUnknown)
 #define IMalloc_GetSize(p,a)    ICOM_CALL1(GetSize,p,a)
 #define IMalloc_DidAlloc(p,a)   ICOM_CALL1(DidAlloc,p,a)
 #define IMalloc_HeapMinimize(p) ICOM_CALL (HeapMinimize,p)
-
-#ifndef __WINE__
-/* Duplicated for WINELIB */
-/*** IUnknown methods ***/
-#define IMalloc_QueryInterface(p,a,b) ICOM_CALL2(QueryInterface,p,a,b)
-#define IMalloc_AddRef(p)             ICOM_CALL (AddRef,p)
-#define IMalloc_Release(p)            ICOM_CALL (Release,p)
-/*** IMalloc methods ***/
-#define IMalloc_Alloc(p,a)      ICOM_CALL1(Alloc,p,a)
-#define IMalloc_Realloc(p,a,b)  ICOM_CALL2(Realloc,p,a,b)
-#define IMalloc_Free(p,a)       ICOM_CALL1(Free,p,a)
-#define IMalloc_GetSize(p,a)    ICOM_CALL1(GetSize,p,a)
-#define IMalloc_DidAlloc(p,a)   ICOM_CALL1(DidAlloc,p,a)
-#define IMalloc_HeapMinimize(p) ICOM_CALL (HeapMinimize,p)
-#endif
 #endif
 
 
diff --git a/multimedia/dplay.c b/multimedia/dplay.c
index 429a747b678..b12501c7db3 100644
--- a/multimedia/dplay.c
+++ b/multimedia/dplay.c
@@ -1196,7 +1196,9 @@ static HRESULT WINAPI IDirectPlayLobby2AImpl_CreateCompoundAddress
 
 /* Direct Play Lobby 1 (ascii) Virtual Table for methods */
 /* All lobby 1 methods are exactly the same except QueryInterface */
-static struct ICOM_VTABLE(IDirectPlayLobby) directPlayLobbyAVT = {
+static struct ICOM_VTABLE(IDirectPlayLobby) directPlayLobbyAVT = 
+{
+  ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
   IDirectPlayLobbyAImpl_QueryInterface,
   XCAST(AddRef)IDirectPlayLobby2AImpl_AddRef,
   XCAST(Release)IDirectPlayLobby2AImpl_Release,
@@ -1223,7 +1225,9 @@ static struct ICOM_VTABLE(IDirectPlayLobby) directPlayLobbyAVT = {
 #endif
 
 /* Direct Play Lobby 1 (unicode) Virtual Table for methods */
-static ICOM_VTABLE(IDirectPlayLobby) directPlayLobbyWVT = {
+static ICOM_VTABLE(IDirectPlayLobby) directPlayLobbyWVT = 
+{
+  ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
   IDirectPlayLobbyW_QueryInterface,
   XCAST(AddRef)IDirectPlayLobby2WImpl_AddRef,
   XCAST(Release)IDirectPlayLobby2WImpl_Release,
@@ -1243,7 +1247,9 @@ static ICOM_VTABLE(IDirectPlayLobby) directPlayLobbyWVT = {
 
 
 /* Direct Play Lobby 2 (ascii) Virtual Table for methods */
-static ICOM_VTABLE(IDirectPlayLobby2) directPlayLobby2AVT = {
+static ICOM_VTABLE(IDirectPlayLobby2) directPlayLobby2AVT = 
+{
+  ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
   IDirectPlayLobby2AImpl_QueryInterface,
   IDirectPlayLobby2AImpl_AddRef,
   IDirectPlayLobby2AImpl_Release,
@@ -1262,7 +1268,9 @@ static ICOM_VTABLE(IDirectPlayLobby2) directPlayLobby2AVT = {
 };
 
 /* Direct Play Lobby 2 (unicode) Virtual Table for methods */
-static ICOM_VTABLE(IDirectPlayLobby2) directPlayLobby2WVT = {
+static ICOM_VTABLE(IDirectPlayLobby2) directPlayLobby2WVT = 
+{
+  ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
   IDirectPlayLobby2WImpl_QueryInterface,
   IDirectPlayLobby2WImpl_AddRef, 
   IDirectPlayLobby2WImpl_Release,
@@ -2473,7 +2481,9 @@ HRESULT WINAPI DirectPlay3WImpl_GetPlayerFlags
 # define XCAST(fun)     (void*)
 #endif
 
-static ICOM_VTABLE(IDirectPlay2) directPlay2WVT = {
+static ICOM_VTABLE(IDirectPlay2) directPlay2WVT = 
+{
+  ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
   DirectPlay2W_QueryInterface,
   XCAST(AddRef)DirectPlay3WImpl_AddRef,
   XCAST(Release)DirectPlay3WImpl_Release,
@@ -2517,7 +2527,9 @@ static ICOM_VTABLE(IDirectPlay2) directPlay2WVT = {
 # define XCAST(fun)     (void*)
 #endif
 
-static ICOM_VTABLE(IDirectPlay2) directPlay2AVT = {
+static ICOM_VTABLE(IDirectPlay2) directPlay2AVT = 
+{
+  ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
   DirectPlay2A_QueryInterface,
   XCAST(AddRef)DirectPlay3WImpl_AddRef,
   XCAST(Release)DirectPlay3A_Release,
@@ -2554,7 +2566,9 @@ static ICOM_VTABLE(IDirectPlay2) directPlay2AVT = {
 #undef XCAST
 
 
-static ICOM_VTABLE(IDirectPlay3) directPlay3AVT = {
+static ICOM_VTABLE(IDirectPlay3) directPlay3AVT = 
+{
+  ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
   DirectPlay3A_QueryInterface,
   DirectPlay3WImpl_AddRef,
   DirectPlay3A_Release,
@@ -2605,7 +2619,9 @@ static ICOM_VTABLE(IDirectPlay3) directPlay3AVT = {
   DirectPlay3A_GetPlayerFlags
 };
 
-static ICOM_VTABLE(IDirectPlay3) directPlay3WVT = {
+static ICOM_VTABLE(IDirectPlay3) directPlay3WVT = 
+{
+  ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
   DirectPlay3WImpl_QueryInterface,
   DirectPlay3WImpl_AddRef,
   DirectPlay3WImpl_Release,
diff --git a/multimedia/dsound.c b/multimedia/dsound.c
index 7ba17445e4b..c46cf906917 100644
--- a/multimedia/dsound.c
+++ b/multimedia/dsound.c
@@ -430,7 +430,9 @@ static HRESULT WINAPI IDirectSound3DBufferImpl_SetVelocity(
 	return DS_OK;
 }
 
-ICOM_VTABLE(IDirectSound3DBuffer) ds3dbvt = {
+ICOM_VTABLE(IDirectSound3DBuffer) ds3dbvt = 
+{
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 	/* IUnknown methods */
 	IDirectSound3DBufferImpl_QueryInterface,
 	IDirectSound3DBufferImpl_AddRef,
@@ -691,7 +693,9 @@ static HRESULT WINAPI IDirectSound3DListenerImpl_CommitDeferredSettings(
 	return DS_OK;
 }
 
-ICOM_VTABLE(IDirectSound3DListener) ds3dlvt = {
+ICOM_VTABLE(IDirectSound3DListener) ds3dlvt = 
+{
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 	/* IUnknown methods */
 	IDirectSound3DListenerImpl_QueryInterface,
 	IDirectSound3DListenerImpl_AddRef,
@@ -766,7 +770,9 @@ static HRESULT WINAPI IDirectSoundNotifyImpl_SetNotificationPositions(
 	return 0;
 }
 
-ICOM_VTABLE(IDirectSoundNotify) dsnvt = {
+ICOM_VTABLE(IDirectSoundNotify) dsnvt = 
+{
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 	IDirectSoundNotifyImpl_QueryInterface,
 	IDirectSoundNotifyImpl_AddRef,
 	IDirectSoundNotifyImpl_Release,
@@ -1251,7 +1257,9 @@ static HRESULT WINAPI IDirectSoundBufferImpl_QueryInterface(
 	return E_FAIL;
 }
 
-static ICOM_VTABLE(IDirectSoundBuffer) dsbvt = {
+static ICOM_VTABLE(IDirectSoundBuffer) dsbvt = 
+{
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 	IDirectSoundBufferImpl_QueryInterface,
 	IDirectSoundBufferImpl_AddRef,
 	IDirectSoundBufferImpl_Release,
@@ -1589,7 +1597,9 @@ static HRESULT WINAPI IDirectSoundImpl_Initialize(
 	return DS_OK;
 }
 
-static ICOM_VTABLE(IDirectSound) dsvt = {
+static ICOM_VTABLE(IDirectSound) dsvt = 
+{
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 	IDirectSoundImpl_QueryInterface,
 	IDirectSoundImpl_AddRef,
 	IDirectSoundImpl_Release,
diff --git a/ole/antimoniker.c b/ole/antimoniker.c
index 9d537c36d1f..f2c1484886d 100644
--- a/ole/antimoniker.c
+++ b/ole/antimoniker.c
@@ -84,6 +84,7 @@ HRESULT WINAPI AntiMonikerImpl_Destroy(AntiMonikerImpl* iface);
 /* IPersistStream and IMoniker functions.                                       */
 static ICOM_VTABLE(IMoniker) VT_AntiMonikerImpl =
 {
+    ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
     AntiMonikerImpl_QueryInterface,
     AntiMonikerImpl_AddRef,
     AntiMonikerImpl_Release,
@@ -113,6 +114,7 @@ static ICOM_VTABLE(IMoniker) VT_AntiMonikerImpl =
 /* Virtual function table for the IROTData class.                               */
 static ICOM_VTABLE(IROTData) VT_ROTDataImpl =
 {
+    ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
     AntiMonikerROTDataImpl_QueryInterface,
     AntiMonikerROTDataImpl_AddRef,
     AntiMonikerROTDataImpl_Release,
diff --git a/ole/bindctx.c b/ole/bindctx.c
index 355a23aa4cf..b84c00abfd1 100644
--- a/ole/bindctx.c
+++ b/ole/bindctx.c
@@ -68,6 +68,7 @@ HRESULT WINAPI BindCtxImpl_GetObjectIndex(BindCtxImpl* This,IUnknown* punk,LPOLE
 /* Virtual function table for the BindCtx class. */
 static ICOM_VTABLE(IBindCtx) VT_BindCtxImpl =
     {
+    ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
     BindCtxImpl_QueryInterface,
     BindCtxImpl_AddRef,
     BindCtxImpl_Release,
diff --git a/ole/compositemoniker.c b/ole/compositemoniker.c
index 35bef537d2e..2f145f5fcb5 100644
--- a/ole/compositemoniker.c
+++ b/ole/compositemoniker.c
@@ -127,6 +127,7 @@ HRESULT WINAPI EnumMonikerImpl_CreateEnumMoniker(IMoniker** tabMoniker,ULONG tab
 
 static ICOM_VTABLE(IMoniker) VT_CompositeMonikerImpl =
 {
+    ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
     CompositeMonikerImpl_QueryInterface,
     CompositeMonikerImpl_AddRef,
     CompositeMonikerImpl_Release,
@@ -156,6 +157,7 @@ static ICOM_VTABLE(IMoniker) VT_CompositeMonikerImpl =
 /* Virtual function table for the IROTData class.                               */
 static ICOM_VTABLE(IROTData) VT_ROTDataImpl =
 {
+    ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
     CompositeMonikerROTDataImpl_QueryInterface,
     CompositeMonikerROTDataImpl_AddRef,
     CompositeMonikerROTDataImpl_Release,
@@ -166,6 +168,7 @@ static ICOM_VTABLE(IROTData) VT_ROTDataImpl =
 /* Virtual function table for the IROTData class                                */
 static ICOM_VTABLE(IEnumMoniker) VT_EnumMonikerImpl =
 {
+    ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
     EnumMonikerImpl_QueryInterface,
     EnumMonikerImpl_AddRef,
     EnumMonikerImpl_Release,
diff --git a/ole/datacache.c b/ole/datacache.c
index 365878d7936..ed461d67dcf 100644
--- a/ole/datacache.c
+++ b/ole/datacache.c
@@ -354,6 +354,7 @@ static HRESULT WINAPI DataCache_OnStop(
  */
 static ICOM_VTABLE(IUnknown) DataCache_NDIUnknown_VTable =
 {
+  ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
   DataCache_NDIUnknown_QueryInterface,
   DataCache_NDIUnknown_AddRef,
   DataCache_NDIUnknown_Release
@@ -361,6 +362,7 @@ static ICOM_VTABLE(IUnknown) DataCache_NDIUnknown_VTable =
 
 static ICOM_VTABLE(IDataObject) DataCache_IDataObject_VTable =
 {
+  ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
   DataCache_IDataObject_QueryInterface,
   DataCache_IDataObject_AddRef,
   DataCache_IDataObject_Release,
@@ -377,6 +379,7 @@ static ICOM_VTABLE(IDataObject) DataCache_IDataObject_VTable =
 
 static ICOM_VTABLE(IPersistStorage) DataCache_IPersistStorage_VTable =
 {
+  ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
   DataCache_IPersistStorage_QueryInterface,
   DataCache_IPersistStorage_AddRef,
   DataCache_IPersistStorage_Release,
@@ -391,6 +394,7 @@ static ICOM_VTABLE(IPersistStorage) DataCache_IPersistStorage_VTable =
 
 static ICOM_VTABLE(IViewObject2) DataCache_IViewObject2_VTable =
 {
+  ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
   DataCache_IViewObject2_QueryInterface,
   DataCache_IViewObject2_AddRef,
   DataCache_IViewObject2_Release,
@@ -405,6 +409,7 @@ static ICOM_VTABLE(IViewObject2) DataCache_IViewObject2_VTable =
 
 static ICOM_VTABLE(IOleCache2) DataCache_IOleCache2_VTable =
 {
+  ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
   DataCache_IOleCache2_QueryInterface,
   DataCache_IOleCache2_AddRef,
   DataCache_IOleCache2_Release,
@@ -419,6 +424,7 @@ static ICOM_VTABLE(IOleCache2) DataCache_IOleCache2_VTable =
 
 static ICOM_VTABLE(IOleCacheControl) DataCache_IOleCacheControl_VTable =
 {
+  ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
   DataCache_IOleCacheControl_QueryInterface,
   DataCache_IOleCacheControl_AddRef,
   DataCache_IOleCacheControl_Release,
diff --git a/ole/defaulthandler.c b/ole/defaulthandler.c
index 51787a40218..9f83959f244 100644
--- a/ole/defaulthandler.c
+++ b/ole/defaulthandler.c
@@ -305,6 +305,7 @@ static HRESULT WINAPI DefaultHandler_SetContainedObject(
  */
 static ICOM_VTABLE(IOleObject) DefaultHandler_IOleObject_VTable =
 {
+  ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
   DefaultHandler_QueryInterface,
   DefaultHandler_AddRef,
   DefaultHandler_Release,
@@ -333,6 +334,7 @@ static ICOM_VTABLE(IOleObject) DefaultHandler_IOleObject_VTable =
 
 static ICOM_VTABLE(IUnknown) DefaultHandler_NDIUnknown_VTable =
 {
+  ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
   DefaultHandler_NDIUnknown_QueryInterface,
   DefaultHandler_NDIUnknown_AddRef,
   DefaultHandler_NDIUnknown_Release,
@@ -340,6 +342,7 @@ static ICOM_VTABLE(IUnknown) DefaultHandler_NDIUnknown_VTable =
 
 static ICOM_VTABLE(IDataObject) DefaultHandler_IDataObject_VTable =
 {
+  ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
   DefaultHandler_IDataObject_QueryInterface,
   DefaultHandler_IDataObject_AddRef,
   DefaultHandler_IDataObject_Release,
@@ -356,6 +359,7 @@ static ICOM_VTABLE(IDataObject) DefaultHandler_IDataObject_VTable =
 
 static ICOM_VTABLE(IRunnableObject) DefaultHandler_IRunnableObject_VTable =
 {
+  ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
   DefaultHandler_IRunnableObject_QueryInterface,
   DefaultHandler_IRunnableObject_AddRef,
   DefaultHandler_IRunnableObject_Release,
diff --git a/ole/filemoniker.c b/ole/filemoniker.c
index cac619c0c59..fd7cb02ddad 100644
--- a/ole/filemoniker.c
+++ b/ole/filemoniker.c
@@ -89,6 +89,7 @@ int     WINAPI FileMonikerImpl_DecomposePath(LPOLESTR str, LPOLESTR** tabStr);
 /* IPersistStream and IMoniker functions.                                       */
 static ICOM_VTABLE(IMoniker) VT_FileMonikerImpl =
 {
+    ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
     FileMonikerImpl_QueryInterface,
     FileMonikerImpl_AddRef,
     FileMonikerImpl_Release,
@@ -118,6 +119,7 @@ static ICOM_VTABLE(IMoniker) VT_FileMonikerImpl =
 /* Virtual function table for the IROTData class.                               */
 static ICOM_VTABLE(IROTData) VT_ROTDataImpl =
 {
+    ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
     FileMonikerROTDataImpl_QueryInterface,
     FileMonikerROTDataImpl_AddRef,
     FileMonikerROTDataImpl_Release,
diff --git a/ole/hglobalstream.c b/ole/hglobalstream.c
index 6346c8e0c32..cce4b2ac0d6 100644
--- a/ole/hglobalstream.c
+++ b/ole/hglobalstream.c
@@ -146,6 +146,7 @@ HRESULT WINAPI HGLOBALStreamImpl_Clone(
  */
 static ICOM_VTABLE(IStream) HGLOBALStreamImpl_Vtbl =
 {
+    ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
     HGLOBALStreamImpl_QueryInterface,
     HGLOBALStreamImpl_AddRef,
     HGLOBALStreamImpl_Release,
diff --git a/ole/ifs.c b/ole/ifs.c
index 91e9549022d..7443682e0fe 100644
--- a/ole/ifs.c
+++ b/ole/ifs.c
@@ -69,7 +69,9 @@ static HRESULT WINAPI IUnknown_fnQueryInterface(LPUNKNOWN iface,REFIID refiid,LP
 	return OLE_E_ENUM_NOMORE; 
 }
 
-static ICOM_VTABLE(IUnknown) uvt = {
+static ICOM_VTABLE(IUnknown) uvt = 
+{
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 	IUnknown_fnQueryInterface,
 	IUnknown_fnAddRef,
 	IUnknown_fnRelease
@@ -328,7 +330,9 @@ static LPVOID WINAPI IMalloc_fnHeapMinimize(LPMALLOC iface) {
 	return NULL;
 }
 
-static ICOM_VTABLE(IMalloc) VT_IMalloc32 = {
+static ICOM_VTABLE(IMalloc) VT_IMalloc32 = 
+{
+    ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
     IMalloc_fnQueryInterface,
     IMalloc_fnAddRef,
   IMalloc_fnRelease,
diff --git a/ole/itemmoniker.c b/ole/itemmoniker.c
index 8633d95db0d..98fb5ab741b 100644
--- a/ole/itemmoniker.c
+++ b/ole/itemmoniker.c
@@ -88,6 +88,7 @@ static HRESULT WINAPI ItemMonikerROTDataImpl_GetComparaisonData(IROTData* iface,
 /* IPersistStream and IMoniker functions.                                       */
 static ICOM_VTABLE(IMoniker) VT_ItemMonikerImpl =
     {
+    ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
     ItemMonikerImpl_QueryInterface,
     ItemMonikerImpl_AddRef,
     ItemMonikerImpl_Release,
@@ -117,6 +118,7 @@ static ICOM_VTABLE(IMoniker) VT_ItemMonikerImpl =
 /* Virtual function table for the IROTData class.                               */
 static ICOM_VTABLE(IROTData) VT_ROTDataImpl =
 {
+    ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
     ItemMonikerROTDataImpl_QueryInterface,
     ItemMonikerROTDataImpl_AddRef,
     ItemMonikerROTDataImpl_Release,
diff --git a/ole/memlockbytes.c b/ole/memlockbytes.c
index 2381db89265..6be250c2e4b 100644
--- a/ole/memlockbytes.c
+++ b/ole/memlockbytes.c
@@ -116,6 +116,7 @@ HRESULT WINAPI HGLOBALLockBytesImpl_Stat(
  */
 static ICOM_VTABLE(ILockBytes) HGLOBALLockBytesImpl_Vtbl =
 {
+    ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
     HGLOBALLockBytesImpl_QueryInterface,
     HGLOBALLockBytesImpl_AddRef,
     HGLOBALLockBytesImpl_Release,
diff --git a/ole/moniker.c b/ole/moniker.c
index 719219acff7..6f27879296c 100644
--- a/ole/moniker.c
+++ b/ole/moniker.c
@@ -62,6 +62,7 @@ HRESULT WINAPI RunningObjectTableImpl_GetObjectIndex(RunningObjectTableImpl* Thi
 /* Virtual function table for the IRunningObjectTable class. */
 static ICOM_VTABLE(IRunningObjectTable) VT_RunningObjectTableImpl =
 {
+    ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
     RunningObjectTableImpl_QueryInterface,
     RunningObjectTableImpl_AddRef,
     RunningObjectTableImpl_Release,
diff --git a/ole/olefont.c b/ole/olefont.c
index 0c62d5cb7ed..d5e16d3fbec 100644
--- a/ole/olefont.c
+++ b/ole/olefont.c
@@ -168,6 +168,7 @@ static HRESULT WINAPI OLEFontImpl_GetSizeMax(IPersistStream*  iface,
  */
 static ICOM_VTABLE(IFont) OLEFontImpl_VTable =
 {
+  ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
   OLEFontImpl_QueryInterface,
   OLEFontImpl_AddRef,
   OLEFontImpl_Release,
@@ -199,6 +200,7 @@ static ICOM_VTABLE(IFont) OLEFontImpl_VTable =
 
 static ICOM_VTABLE(IDispatch) OLEFontImpl_IDispatch_VTable =
 {
+  ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
   OLEFontImpl_IDispatch_QueryInterface,
   OLEFontImpl_IDispatch_AddRef,
   OLEFontImpl_IDispatch_Release,
@@ -210,6 +212,7 @@ static ICOM_VTABLE(IDispatch) OLEFontImpl_IDispatch_VTable =
 
 static ICOM_VTABLE(IPersistStream) OLEFontImpl_IPersistStream_VTable =
 {
+  ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
   OLEFontImpl_IPersistStream_QueryInterface,
   OLEFontImpl_IPersistStream_AddRef,
   OLEFontImpl_IPersistStream_Release,
diff --git a/ole/oleobj.c b/ole/oleobj.c
index 87519e508cf..9090250d4d0 100644
--- a/ole/oleobj.c
+++ b/ole/oleobj.c
@@ -386,6 +386,7 @@ static HRESULT WINAPI     DataAdviseHolder_SendOnDataChange(
  */
 static struct ICOM_VTABLE(IDataAdviseHolder) DataAdviseHolderImpl_VTable =
 {
+  ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
   DataAdviseHolder_QueryInterface,
   DataAdviseHolder_AddRef,
   DataAdviseHolder_Release,
diff --git a/ole/stg_stream.c b/ole/stg_stream.c
index 2ef6bd23065..2504d800a71 100644
--- a/ole/stg_stream.c
+++ b/ole/stg_stream.c
@@ -28,6 +28,7 @@ DEFAULT_DEBUG_CHANNEL(storage)
  */
 static ICOM_VTABLE(IStream) StgStreamImpl_Vtbl =
 {
+    ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
     StgStreamImpl_QueryInterface,
     StgStreamImpl_AddRef,
     StgStreamImpl_Release,
diff --git a/ole/storage32.c b/ole/storage32.c
index dc41df63f20..c0356a7e637 100644
--- a/ole/storage32.c
+++ b/ole/storage32.c
@@ -89,6 +89,7 @@ static DWORD GetCreationModeFromSTGM(DWORD stgm);
  */
 static ICOM_VTABLE(IStorage) Storage32Impl_Vtbl =
 {
+    ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
     StorageBaseImpl_QueryInterface,
     StorageBaseImpl_AddRef,
     StorageBaseImpl_Release,
@@ -114,6 +115,7 @@ static ICOM_VTABLE(IStorage) Storage32Impl_Vtbl =
  */
 static ICOM_VTABLE(IStorage) Storage32InternalImpl_Vtbl =
   {
+    ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
     StorageBaseImpl_QueryInterface,
     StorageBaseImpl_AddRef,
     StorageBaseImpl_Release,
@@ -139,6 +141,7 @@ static ICOM_VTABLE(IStorage) Storage32InternalImpl_Vtbl =
  */
 static ICOM_VTABLE(IEnumSTATSTG) IEnumSTATSTGImpl_Vtbl =
 {
+    ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
     IEnumSTATSTGImpl_QueryInterface,
     IEnumSTATSTGImpl_AddRef,
     IEnumSTATSTGImpl_Release,
diff --git a/windows/dinput.c b/windows/dinput.c
index 79bdd757432..05514b34a2f 100644
--- a/windows/dinput.c
+++ b/windows/dinput.c
@@ -291,7 +291,9 @@ static HRESULT WINAPI IDirectInputAImpl_RunControlPanel(LPDIRECTINPUTA iface,
   return DI_OK;
 }
 
-static ICOM_VTABLE(IDirectInputA) ddiavt= {
+static ICOM_VTABLE(IDirectInputA) ddiavt = 
+{
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 	IDirectInputAImpl_QueryInterface,
 	IDirectInputAImpl_AddRef,
 	IDirectInputAImpl_Release,
@@ -1096,7 +1098,9 @@ static HRESULT WINAPI SysMouseAImpl_SetProperty(LPDIRECTINPUTDEVICE2A iface,
 }
 
 
-static ICOM_VTABLE(IDirectInputDevice2A) SysKeyboardAvt={
+static ICOM_VTABLE(IDirectInputDevice2A) SysKeyboardAvt = 
+{
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 	IDirectInputDevice2AImpl_QueryInterface,
 	IDirectInputDevice2AImpl_AddRef,
 	IDirectInputDevice2AImpl_Release,
@@ -1126,7 +1130,9 @@ static ICOM_VTABLE(IDirectInputDevice2A) SysKeyboardAvt={
 	IDirectInputDevice2AImpl_SendDeviceData,
 };
 
-static ICOM_VTABLE(IDirectInputDevice2A) SysMouseAvt={
+static ICOM_VTABLE(IDirectInputDevice2A) SysMouseAvt = 
+{
+	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 	IDirectInputDevice2AImpl_QueryInterface,
 	IDirectInputDevice2AImpl_AddRef,
 	SysMouseAImpl_Release,