diff --git a/dlls/msctf/categorymgr.c b/dlls/msctf/categorymgr.c
index c1596c24a2..ad43833d62 100644
--- a/dlls/msctf/categorymgr.c
+++ b/dlls/msctf/categorymgr.c
@@ -63,7 +63,7 @@ static HRESULT WINAPI CategoryMgr_QueryInterface(ITfCategoryMgr *iface, REFIID i
 
     if (IsEqualIID(iid, &IID_IUnknown) || IsEqualIID(iid, &IID_ITfCategoryMgr))
     {
-        *ppvOut = This;
+        *ppvOut = &This->ITfCategoryMgr_iface;
     }
 
     if (*ppvOut)
@@ -391,12 +391,11 @@ static HRESULT WINAPI CategoryMgr_IsEqualTfGuidAtom ( ITfCategoryMgr *iface,
 }
 
 
-static const ITfCategoryMgrVtbl CategoryMgr_CategoryMgrVtbl =
+static const ITfCategoryMgrVtbl CategoryMgrVtbl =
 {
     CategoryMgr_QueryInterface,
     CategoryMgr_AddRef,
     CategoryMgr_Release,
-
     CategoryMgr_RegisterCategory,
     CategoryMgr_UnregisterCategory,
     CategoryMgr_EnumCategoriesInItem,
@@ -423,10 +422,10 @@ HRESULT CategoryMgr_Constructor(IUnknown *pUnkOuter, IUnknown **ppOut)
     if (This == NULL)
         return E_OUTOFMEMORY;
 
-    This->ITfCategoryMgr_iface.lpVtbl = &CategoryMgr_CategoryMgrVtbl;
+    This->ITfCategoryMgr_iface.lpVtbl = &CategoryMgrVtbl;
     This->refCount = 1;
 
-    TRACE("returning %p\n", This);
-    *ppOut = (IUnknown *)This;
+    *ppOut = (IUnknown *)&This->ITfCategoryMgr_iface;
+    TRACE("returning %p\n", *ppOut);
     return S_OK;
 }
diff --git a/dlls/msctf/compartmentmgr.c b/dlls/msctf/compartmentmgr.c
index eaf072fed7..81826796d0 100644
--- a/dlls/msctf/compartmentmgr.c
+++ b/dlls/msctf/compartmentmgr.c
@@ -141,7 +141,7 @@ static HRESULT WINAPI CompartmentMgr_QueryInterface(ITfCompartmentMgr *iface, RE
 
         if (IsEqualIID(iid, &IID_IUnknown) || IsEqualIID(iid, &IID_ITfCompartmentMgr))
         {
-            *ppvOut = This;
+            *ppvOut = &This->ITfCompartmentMgr_iface;
         }
 
         if (*ppvOut)
@@ -285,8 +285,8 @@ HRESULT CompartmentMgr_Constructor(IUnknown *pUnkOuter, REFIID riid, IUnknown **
 
     if (pUnkOuter)
     {
-        TRACE("returning %p\n", This);
-        *ppOut = (IUnknown*)This;
+        *ppOut = (IUnknown*)&This->ITfCompartmentMgr_iface;
+        TRACE("returning %p\n", *ppOut);
         return S_OK;
     }
     else
@@ -436,8 +436,8 @@ static HRESULT CompartmentEnumGuid_Constructor(struct list *values, IEnumGUID **
     This->values = values;
     This->cursor = list_head(values);
 
-    TRACE("returning %p\n", This);
-    *ppOut = (IEnumGUID*)This;
+    *ppOut = &This->IEnumGUID_iface;
+    TRACE("returning %p\n", *ppOut);
     return S_OK;
 }
 
@@ -670,7 +670,7 @@ static HRESULT Compartment_Constructor(CompartmentValue *valueData, ITfCompartme
 
     list_init(&This->CompartmentEventSink);
 
-    TRACE("returning %p\n", This);
-    *ppOut = (ITfCompartment*)This;
+    *ppOut = &This->ITfCompartment_iface;
+    TRACE("returning %p\n", *ppOut);
     return S_OK;
 }
diff --git a/dlls/msctf/context.c b/dlls/msctf/context.c
index 13898f5210..941245c10d 100644
--- a/dlls/msctf/context.c
+++ b/dlls/msctf/context.c
@@ -722,7 +722,7 @@ static HRESULT WINAPI InsertAtSelection_InsertTextAtSelection(
 
     hr = ITextStoreACP_InsertTextAtSelection(This->pITextStoreACP, dwFlags, pchText, cch, &acpStart, &acpEnd, &change);
     if (SUCCEEDED(hr))
-        Range_Constructor((ITfContext*)This, This->pITextStoreACP, cookie->lockType, change.acpStart, change.acpNewEnd, ppRange);
+        Range_Constructor(&This->ITfContext_iface, This->pITextStoreACP, cookie->lockType, change.acpStart, change.acpNewEnd, ppRange);
 
     return hr;
 }
@@ -844,8 +844,8 @@ HRESULT Context_Constructor(TfClientId tidOwner, IUnknown *punk, ITfDocumentMgr
     list_init(&This->pTextEditSink);
     list_init(&This->pTextLayoutSink);
 
-    *ppOut = (ITfContext*)This;
-    TRACE("returning %p\n", This);
+    *ppOut = &This->ITfContext_iface;
+    TRACE("returning %p\n", *ppOut);
 
     return S_OK;
 }
@@ -1101,7 +1101,7 @@ static HRESULT TextStoreACPSink_Constructor(ITextStoreACPSink **ppOut, Context *
 
     This->pContext = pContext;
 
-    TRACE("returning %p\n", This);
     *ppOut = &This->ITextStoreACPSink_iface;
+    TRACE("returning %p\n", *ppOut);
     return S_OK;
 }
diff --git a/dlls/msctf/displayattributemgr.c b/dlls/msctf/displayattributemgr.c
index 8f7869ba95..c8bb71e2ce 100644
--- a/dlls/msctf/displayattributemgr.c
+++ b/dlls/msctf/displayattributemgr.c
@@ -114,12 +114,11 @@ static HRESULT WINAPI DisplayAttributeMgr_GetDisplayAttributeInfo(ITfDisplayAttr
     return E_NOTIMPL;
 }
 
-static const ITfDisplayAttributeMgrVtbl DisplayAttributeMgr_DisplayAttributeMgrVtbl =
+static const ITfDisplayAttributeMgrVtbl DisplayAttributeMgrVtbl =
 {
     DisplayAttributeMgr_QueryInterface,
     DisplayAttributeMgr_AddRef,
     DisplayAttributeMgr_Release,
-
     DisplayAttributeMgr_OnUpdateInfo,
     DisplayAttributeMgr_EnumDisplayAttributeInfo,
     DisplayAttributeMgr_GetDisplayAttributeInfo
@@ -135,10 +134,10 @@ HRESULT DisplayAttributeMgr_Constructor(IUnknown *pUnkOuter, IUnknown **ppOut)
     if (This == NULL)
         return E_OUTOFMEMORY;
 
-    This->ITfDisplayAttributeMgr_iface.lpVtbl = &DisplayAttributeMgr_DisplayAttributeMgrVtbl;
+    This->ITfDisplayAttributeMgr_iface.lpVtbl = &DisplayAttributeMgrVtbl;
     This->refCount = 1;
 
-    TRACE("returning %p\n", This);
-    *ppOut = (IUnknown *)This;
+    *ppOut = (IUnknown *)&This->ITfDisplayAttributeMgr_iface;
+    TRACE("returning %p\n", *ppOut);
     return S_OK;
 }
diff --git a/dlls/msctf/documentmgr.c b/dlls/msctf/documentmgr.c
index fadbb060e1..956932b775 100644
--- a/dlls/msctf/documentmgr.c
+++ b/dlls/msctf/documentmgr.c
@@ -262,12 +262,11 @@ static HRESULT WINAPI DocumentMgr_EnumContexts(ITfDocumentMgr *iface, IEnumTfCon
     return EnumTfContext_Constructor(This, ppEnum);
 }
 
-static const ITfDocumentMgrVtbl DocumentMgr_DocumentMgrVtbl =
+static const ITfDocumentMgrVtbl DocumentMgrVtbl =
 {
     DocumentMgr_QueryInterface,
     DocumentMgr_AddRef,
     DocumentMgr_Release,
-
     DocumentMgr_CreateContext,
     DocumentMgr_Push,
     DocumentMgr_Pop,
@@ -276,20 +275,19 @@ static const ITfDocumentMgrVtbl DocumentMgr_DocumentMgrVtbl =
     DocumentMgr_EnumContexts
 };
 
-
-static HRESULT WINAPI Source_QueryInterface(ITfSource *iface, REFIID iid, LPVOID *ppvOut)
+static HRESULT WINAPI DocumentMgrSource_QueryInterface(ITfSource *iface, REFIID iid, LPVOID *ppvOut)
 {
     DocumentMgr *This = impl_from_ITfSource(iface);
     return ITfDocumentMgr_QueryInterface(&This->ITfDocumentMgr_iface, iid, ppvOut);
 }
 
-static ULONG WINAPI Source_AddRef(ITfSource *iface)
+static ULONG WINAPI DocumentMgrSource_AddRef(ITfSource *iface)
 {
     DocumentMgr *This = impl_from_ITfSource(iface);
     return ITfDocumentMgr_AddRef(&This->ITfDocumentMgr_iface);
 }
 
-static ULONG WINAPI Source_Release(ITfSource *iface)
+static ULONG WINAPI DocumentMgrSource_Release(ITfSource *iface)
 {
     DocumentMgr *This = impl_from_ITfSource(iface);
     return ITfDocumentMgr_Release(&This->ITfDocumentMgr_iface);
@@ -313,12 +311,11 @@ static HRESULT WINAPI DocumentMgrSource_UnadviseSink(ITfSource *iface, DWORD pdw
     return E_NOTIMPL;
 }
 
-static const ITfSourceVtbl DocumentMgr_SourceVtbl =
+static const ITfSourceVtbl DocumentMgrSourceVtbl =
 {
-    Source_QueryInterface,
-    Source_AddRef,
-    Source_Release,
-
+    DocumentMgrSource_QueryInterface,
+    DocumentMgrSource_AddRef,
+    DocumentMgrSource_Release,
     DocumentMgrSource_AdviseSink,
     DocumentMgrSource_UnadviseSink,
 };
@@ -331,15 +328,15 @@ HRESULT DocumentMgr_Constructor(ITfThreadMgrEventSink *ThreadMgrSink, ITfDocumen
     if (This == NULL)
         return E_OUTOFMEMORY;
 
-    This->ITfDocumentMgr_iface.lpVtbl = &DocumentMgr_DocumentMgrVtbl;
-    This->ITfSource_iface.lpVtbl = &DocumentMgr_SourceVtbl;
+    This->ITfDocumentMgr_iface.lpVtbl = &DocumentMgrVtbl;
+    This->ITfSource_iface.lpVtbl = &DocumentMgrSourceVtbl;
     This->refCount = 1;
     This->ThreadMgrSink = ThreadMgrSink;
 
-    CompartmentMgr_Constructor((IUnknown*)This, &IID_IUnknown, (IUnknown**)&This->CompartmentMgr);
+    CompartmentMgr_Constructor((IUnknown*)&This->ITfDocumentMgr_iface, &IID_IUnknown, (IUnknown**)&This->CompartmentMgr);
 
-    TRACE("returning %p\n", This);
     *ppOut = &This->ITfDocumentMgr_iface;
+    TRACE("returning %p\n", *ppOut);
     return S_OK;
 }
 
@@ -477,7 +474,7 @@ static HRESULT EnumTfContext_Constructor(DocumentMgr *mgr, IEnumTfContexts **ppO
     This->refCount = 1;
     This->docmgr = mgr;
 
-    TRACE("returning %p\n", This);
     *ppOut = &This->IEnumTfContexts_iface;
+    TRACE("returning %p\n", *ppOut);
     return S_OK;
 }
diff --git a/dlls/msctf/inputprocessor.c b/dlls/msctf/inputprocessor.c
index ad8a9b8b7f..5115a845ba 100644
--- a/dlls/msctf/inputprocessor.c
+++ b/dlls/msctf/inputprocessor.c
@@ -787,8 +787,8 @@ HRESULT InputProcessorProfiles_Constructor(IUnknown *pUnkOuter, IUnknown **ppOut
 
     list_init(&This->LanguageProfileNotifySink);
 
-    TRACE("returning %p\n", This);
-    *ppOut = (IUnknown *)This;
+    *ppOut = (IUnknown *)&This->ITfInputProcessorProfiles_iface;
+    TRACE("returning %p\n", *ppOut);
     return S_OK;
 }
 
@@ -940,8 +940,8 @@ static HRESULT ProfilesEnumGuid_Constructor(IEnumGUID **ppOut)
         return E_FAIL;
     }
 
-    TRACE("returning %p\n", This);
-    *ppOut = (IEnumGUID*)This;
+    *ppOut = &This->IEnumGUID_iface;
+    TRACE("returning %p\n", *ppOut);
     return S_OK;
 }
 
@@ -1181,7 +1181,7 @@ static HRESULT EnumTfLanguageProfiles_Constructor(LANGID langid, IEnumTfLanguage
         return E_FAIL;
     }
 
-    TRACE("returning %p\n", This);
-    *ppOut = (IEnumTfLanguageProfiles*)This;
+    *ppOut = &This->IEnumTfLanguageProfiles_iface;
+    TRACE("returning %p\n", *ppOut);
     return S_OK;
 }
diff --git a/dlls/msctf/langbarmgr.c b/dlls/msctf/langbarmgr.c
index 29f5f26a6e..f56c130caa 100644
--- a/dlls/msctf/langbarmgr.c
+++ b/dlls/msctf/langbarmgr.c
@@ -192,7 +192,7 @@ HRESULT LangBarMgr_Constructor(IUnknown *pUnkOuter, IUnknown **ppOut)
     This->ITfLangBarMgr_iface.lpVtbl = &LangBarMgr_LangBarMgrVtbl;
     This->refCount = 1;
 
-    TRACE("returning %p\n", This);
-    *ppOut = (IUnknown *)This;
+    *ppOut = (IUnknown *)&This->ITfLangBarMgr_iface;
+    TRACE("returning %p\n", *ppOut);
     return S_OK;
 }
diff --git a/dlls/msctf/range.c b/dlls/msctf/range.c
index 566e064f21..dca8983efd 100644
--- a/dlls/msctf/range.c
+++ b/dlls/msctf/range.c
@@ -345,7 +345,7 @@ HRESULT Range_Constructor(ITfContext *context, ITextStoreACP *textstore, DWORD l
     This->anchorEnd = anchorEnd;
 
     *ppOut = &This->ITfRange_iface;
-    TRACE("returning %p\n", This);
+    TRACE("returning %p\n", *ppOut);
 
     return S_OK;
 }