diff --git a/dlls/devenum/devenum_main.c b/dlls/devenum/devenum_main.c
index 626f76b6020..621802e9b84 100644
--- a/dlls/devenum/devenum_main.c
+++ b/dlls/devenum/devenum_main.c
@@ -76,7 +76,7 @@ HRESULT WINAPI DEVENUM_DllGetClassObject(REFCLSID rclsid, REFIID iid, LPVOID *pp
      * Oh well - works just fine as it is */
     if (IsEqualGUID(rclsid, &CLSID_SystemDeviceEnum) ||
         IsEqualGUID(rclsid, &CLSID_CDeviceMoniker))
-	return IClassFactory_QueryInterface((LPCLASSFACTORY)&DEVENUM_ClassFactory, iid, ppv);
+	return IClassFactory_QueryInterface((LPCLASSFACTORY)(char*)&DEVENUM_ClassFactory, iid, ppv);
     FIXME("\n\tCLSID:\t%s,\n\tIID:\t%s\n",debugstr_guid(rclsid),debugstr_guid(iid));
     return CLASS_E_CLASSNOTAVAILABLE;
 }
@@ -142,9 +142,13 @@ HRESULT WINAPI DEVENUM_DllRegisterServer(void)
     const WCHAR friendlymidirend[] = {'M','i','d','i',' ','R','e','n','d','e','r','e','r','s',0};
     const WCHAR friendlyextrend[] = {'E','x','t','e','r','n','a','l',' ','R','e','n','d','e','r','e','r','s',0};
     const WCHAR friendlydevctrl[] = {'D','e','v','i','c','e',' ','C','o','n','t','r','o','l',' ','F','i','l','t','e','r','s',0};
+    LPVOID mapvptr;
+
     CoInitialize(NULL);
+    
     res = CoCreateInstance(&CLSID_FilterMapper2, NULL, CLSCTX_INPROC,
-                           &IID_IFilterMapper2, (void **) &pMapper);
+                           &IID_IFilterMapper2,  &mapvptr);
+    pMapper = (IFilterMapper2*)mapvptr;
 
     IFilterMapper2_CreateCategory(pMapper, &CLSID_VideoInputDeviceCategory, MERIT_DO_NOT_USE, friendlyvidcap);
     IFilterMapper2_CreateCategory(pMapper, &CLSID_LegacyAmFilterCategory, MERIT_NORMAL, friendlydshow);
diff --git a/dlls/devenum/mediacatenum.c b/dlls/devenum/mediacatenum.c
index 8903b47f4c1..d9071b0fc42 100644
--- a/dlls/devenum/mediacatenum.c
+++ b/dlls/devenum/mediacatenum.c
@@ -88,8 +88,6 @@ static ULONG WINAPI DEVENUM_IPropertyBag_Release(LPPROPERTYBAG iface)
     return This->ref;
 }
 
-static const WCHAR wszNull = '\0';
-
 static HRESULT WINAPI DEVENUM_IPropertyBag_Read(
     LPPROPERTYBAG iface,
     LPCOLESTR pszPropName,
@@ -375,7 +373,9 @@ static HRESULT WINAPI DEVENUM_IMediaCatMoniker_BindToObject(
     if(pmkToLeft==NULL)
     {
             /* first activation of this class */
-            res=IMoniker_BindToStorage(iface, NULL, NULL, &IID_IPropertyBag, (void**)&pProp);
+	    LPVOID pvptr;
+            res=IMoniker_BindToStorage(iface, NULL, NULL, &IID_IPropertyBag, &pvptr);
+	    pProp = (IPropertyBag*)pvptr;
             if (SUCCEEDED(res))
             {
                 V_VT(&var) = VT_LPWSTR;
@@ -388,7 +388,8 @@ static HRESULT WINAPI DEVENUM_IMediaCatMoniker_BindToObject(
             }
             if (SUCCEEDED(res))
             {
-                res=CoCreateInstance(&clsID,NULL,CLSCTX_ALL,&IID_IUnknown,(void**)&pObj);
+                res=CoCreateInstance(&clsID,NULL,CLSCTX_ALL,&IID_IUnknown,&pvptr);
+		pObj = (IUnknown*)pvptr;
             }
     }
 
diff --git a/dlls/devenum/parsedisplayname.c b/dlls/devenum/parsedisplayname.c
index b5b1c13d23a..a1628ebb6bc 100644
--- a/dlls/devenum/parsedisplayname.c
+++ b/dlls/devenum/parsedisplayname.c
@@ -131,7 +131,7 @@ static HRESULT WINAPI DEVENUM_IParseDisplayName_ParseDisplayName(
 
     if (SUCCEEDED(res))
     {
-        res = DEVENUM_ICreateDevEnum_CreateClassEnumerator((ICreateDevEnum *)&DEVENUM_CreateDevEnum, &clsidDevice, &pEm, 0);
+        res = DEVENUM_ICreateDevEnum_CreateClassEnumerator((ICreateDevEnum *)(char*)&DEVENUM_CreateDevEnum, &clsidDevice, &pEm, 0);
     }
 
     if (SUCCEEDED(res))