diff --git a/dlls/qmgr/enum_files.c b/dlls/qmgr/enum_files.c
index d7f36cd865f..05659cf19d1 100644
--- a/dlls/qmgr/enum_files.c
+++ b/dlls/qmgr/enum_files.c
@@ -23,6 +23,15 @@
 
 WINE_DEFAULT_DEBUG_CHANNEL(qmgr);
 
+typedef struct
+{
+    IEnumBackgroundCopyFiles IEnumBackgroundCopyFiles_iface;
+    LONG ref;
+    IBackgroundCopyFile **files;
+    ULONG numFiles;
+    ULONG indexFiles;
+} EnumBackgroundCopyFilesImpl;
+
 static void EnumBackgroundCopyFilesDestructor(EnumBackgroundCopyFilesImpl *This)
 {
     ULONG i;
@@ -34,37 +43,39 @@ static void EnumBackgroundCopyFilesDestructor(EnumBackgroundCopyFilesImpl *This)
     HeapFree(GetProcessHeap(), 0, This);
 }
 
-static ULONG WINAPI BITS_IEnumBackgroundCopyFiles_AddRef(
-    IEnumBackgroundCopyFiles* iface)
+static inline EnumBackgroundCopyFilesImpl *impl_from_IEnumBackgroundCopyFiles(IEnumBackgroundCopyFiles *iface)
 {
-    EnumBackgroundCopyFilesImpl *This = (EnumBackgroundCopyFilesImpl *) iface;
-    return InterlockedIncrement(&This->ref);
+    return CONTAINING_RECORD(iface, EnumBackgroundCopyFilesImpl, IEnumBackgroundCopyFiles_iface);
 }
 
-static HRESULT WINAPI BITS_IEnumBackgroundCopyFiles_QueryInterface(
-    IEnumBackgroundCopyFiles* iface,
-    REFIID riid,
-    void **ppvObject)
+static HRESULT WINAPI BITS_IEnumBackgroundCopyFiles_QueryInterface(IEnumBackgroundCopyFiles *iface,
+        REFIID riid, void **ppv)
 {
-    EnumBackgroundCopyFilesImpl *This = (EnumBackgroundCopyFilesImpl *) iface;
-    TRACE("IID: %s\n", debugstr_guid(riid));
+    TRACE("(%p,%s,%p)\n", iface, debugstr_guid(riid), ppv);
 
-    if (IsEqualGUID(riid, &IID_IUnknown)
-        || IsEqualGUID(riid, &IID_IEnumBackgroundCopyFiles))
+    if (IsEqualGUID(riid, &IID_IUnknown) || IsEqualGUID(riid, &IID_IEnumBackgroundCopyFiles))
     {
-        *ppvObject = &This->lpVtbl;
-        BITS_IEnumBackgroundCopyFiles_AddRef(iface);
+        *ppv = iface;
+        IEnumBackgroundCopyFiles_AddRef(iface);
         return S_OK;
     }
 
-    *ppvObject = NULL;
+    *ppv = NULL;
     return E_NOINTERFACE;
 }
 
-static ULONG WINAPI BITS_IEnumBackgroundCopyFiles_Release(
-    IEnumBackgroundCopyFiles* iface)
+static ULONG WINAPI BITS_IEnumBackgroundCopyFiles_AddRef(IEnumBackgroundCopyFiles *iface)
 {
-    EnumBackgroundCopyFilesImpl *This = (EnumBackgroundCopyFilesImpl *) iface;
+    EnumBackgroundCopyFilesImpl *This = impl_from_IEnumBackgroundCopyFiles(iface);
+    ULONG ref = InterlockedIncrement(&This->ref);
+
+    TRACE("(%p) ref=%d\n", This, ref);
+    return ref;
+}
+
+static ULONG WINAPI BITS_IEnumBackgroundCopyFiles_Release(IEnumBackgroundCopyFiles *iface)
+{
+    EnumBackgroundCopyFilesImpl *This = impl_from_IEnumBackgroundCopyFiles(iface);
     ULONG ref = InterlockedDecrement(&This->ref);
 
     if (ref == 0)
@@ -74,13 +85,10 @@ static ULONG WINAPI BITS_IEnumBackgroundCopyFiles_Release(
 }
 
 /* Return reference to one or more files in the file enumerator */
-static HRESULT WINAPI BITS_IEnumBackgroundCopyFiles_Next(
-    IEnumBackgroundCopyFiles* iface,
-    ULONG celt,
-    IBackgroundCopyFile **rgelt,
-    ULONG *pceltFetched)
+static HRESULT WINAPI BITS_IEnumBackgroundCopyFiles_Next(IEnumBackgroundCopyFiles *iface,
+        ULONG celt, IBackgroundCopyFile **rgelt, ULONG *pceltFetched)
 {
-    EnumBackgroundCopyFilesImpl *This = (EnumBackgroundCopyFilesImpl *) iface;
+    EnumBackgroundCopyFilesImpl *This = impl_from_IEnumBackgroundCopyFiles(iface);
     ULONG fetched;
     ULONG i;
     IBackgroundCopyFile *file;
@@ -115,11 +123,10 @@ static HRESULT WINAPI BITS_IEnumBackgroundCopyFiles_Next(
 }
 
 /* Skip over one or more files in the file enumerator */
-static HRESULT WINAPI BITS_IEnumBackgroundCopyFiles_Skip(
-    IEnumBackgroundCopyFiles* iface,
-    ULONG celt)
+static HRESULT WINAPI BITS_IEnumBackgroundCopyFiles_Skip(IEnumBackgroundCopyFiles *iface,
+        ULONG celt)
 {
-    EnumBackgroundCopyFilesImpl *This = (EnumBackgroundCopyFilesImpl *) iface;
+    EnumBackgroundCopyFilesImpl *This = impl_from_IEnumBackgroundCopyFiles(iface);
 
     if (celt > This->numFiles - This->indexFiles)
     {
@@ -131,27 +138,24 @@ static HRESULT WINAPI BITS_IEnumBackgroundCopyFiles_Skip(
     return S_OK;
 }
 
-static HRESULT WINAPI BITS_IEnumBackgroundCopyFiles_Reset(
-    IEnumBackgroundCopyFiles* iface)
+static HRESULT WINAPI BITS_IEnumBackgroundCopyFiles_Reset(IEnumBackgroundCopyFiles *iface)
 {
-    EnumBackgroundCopyFilesImpl *This = (EnumBackgroundCopyFilesImpl *) iface;
+    EnumBackgroundCopyFilesImpl *This = impl_from_IEnumBackgroundCopyFiles(iface);
     This->indexFiles = 0;
     return S_OK;
 }
 
-static HRESULT WINAPI BITS_IEnumBackgroundCopyFiles_Clone(
-    IEnumBackgroundCopyFiles* iface,
-    IEnumBackgroundCopyFiles **ppenum)
+static HRESULT WINAPI BITS_IEnumBackgroundCopyFiles_Clone(IEnumBackgroundCopyFiles *iface,
+        IEnumBackgroundCopyFiles **ppenum)
 {
     FIXME("Not implemented\n");
     return E_NOTIMPL;
 }
 
-static HRESULT WINAPI BITS_IEnumBackgroundCopyFiles_GetCount(
-    IEnumBackgroundCopyFiles* iface,
-    ULONG *puCount)
+static HRESULT WINAPI BITS_IEnumBackgroundCopyFiles_GetCount(IEnumBackgroundCopyFiles *iface,
+        ULONG *puCount)
 {
-    EnumBackgroundCopyFilesImpl *This = (EnumBackgroundCopyFilesImpl *) iface;
+    EnumBackgroundCopyFilesImpl *This = impl_from_IEnumBackgroundCopyFiles(iface);
     *puCount = This->numFiles;
     return S_OK;
 }
@@ -181,7 +185,7 @@ HRESULT EnumBackgroundCopyFilesConstructor(LPVOID *ppObj, IBackgroundCopyJob2 *i
     if (!This)
         return E_OUTOFMEMORY;
 
-    This->lpVtbl = &BITS_IEnumBackgroundCopyFiles_Vtbl;
+    This->IEnumBackgroundCopyFiles_iface.lpVtbl = &BITS_IEnumBackgroundCopyFiles_Vtbl;
     This->ref = 1;
 
     /* Create array of files */
@@ -210,6 +214,6 @@ HRESULT EnumBackgroundCopyFilesConstructor(LPVOID *ppObj, IBackgroundCopyJob2 *i
     }
     LeaveCriticalSection(&job->cs);
 
-    *ppObj = &This->lpVtbl;
+    *ppObj = &This->IEnumBackgroundCopyFiles_iface;
     return S_OK;
 }
diff --git a/dlls/qmgr/qmgr.h b/dlls/qmgr/qmgr.h
index 4bd1e34c6dc..93fcd0e450e 100644
--- a/dlls/qmgr/qmgr.h
+++ b/dlls/qmgr/qmgr.h
@@ -46,16 +46,6 @@ typedef struct
     struct list entryFromQmgr;
 } BackgroundCopyJobImpl;
 
-/* Enum background copy files vtbl and related data */
-typedef struct
-{
-    const IEnumBackgroundCopyFilesVtbl *lpVtbl;
-    LONG ref;
-    IBackgroundCopyFile **files;
-    ULONG numFiles;
-    ULONG indexFiles;
-} EnumBackgroundCopyFilesImpl;
-
 /* Background copy file vtbl and related data */
 typedef struct
 {