diff --git a/dlls/dmstyle/auditiontrack.c b/dlls/dmstyle/auditiontrack.c
index 29ad868f773..0bf1c818f6c 100644
--- a/dlls/dmstyle/auditiontrack.c
+++ b/dlls/dmstyle/auditiontrack.c
@@ -316,7 +316,7 @@ static const IPersistStreamVtbl persiststream_vtbl = {
 };
 
 /* for ClassFactory */
-HRESULT WINAPI create_dmauditiontrack(REFIID lpcGUID, void **ppobj)
+HRESULT create_dmauditiontrack(REFIID lpcGUID, void **ppobj)
 {
     IDirectMusicAuditionTrack *track;
     HRESULT hr;
diff --git a/dlls/dmstyle/chordtrack.c b/dlls/dmstyle/chordtrack.c
index 98c9169d2ee..fdaecac1240 100644
--- a/dlls/dmstyle/chordtrack.c
+++ b/dlls/dmstyle/chordtrack.c
@@ -415,7 +415,7 @@ static const IPersistStreamVtbl persiststream_vtbl = {
 };
 
 /* for ClassFactory */
-HRESULT WINAPI create_dmchordtrack(REFIID lpcGUID, void **ppobj)
+HRESULT create_dmchordtrack(REFIID lpcGUID, void **ppobj)
 {
     IDirectMusicChordTrack *track;
     HRESULT hr;
diff --git a/dlls/dmstyle/commandtrack.c b/dlls/dmstyle/commandtrack.c
index 417b7847403..32e0bbe8c0d 100644
--- a/dlls/dmstyle/commandtrack.c
+++ b/dlls/dmstyle/commandtrack.c
@@ -368,7 +368,7 @@ static const IPersistStreamVtbl persiststream_vtbl = {
 };
 
 /* for ClassFactory */
-HRESULT WINAPI create_dmcommandtrack(REFIID lpcGUID, void **ppobj)
+HRESULT create_dmcommandtrack(REFIID lpcGUID, void **ppobj)
 {
     IDirectMusicCommandTrack *track;
     HRESULT hr;
diff --git a/dlls/dmstyle/dmstyle_main.c b/dlls/dmstyle/dmstyle_main.c
index cdee2fefc10..8f951ece5ae 100644
--- a/dlls/dmstyle/dmstyle_main.c
+++ b/dlls/dmstyle/dmstyle_main.c
@@ -41,10 +41,10 @@ LONG DMSTYLE_refCount = 0;
 
 typedef struct {
         IClassFactory IClassFactory_iface;
-        HRESULT WINAPI (*fnCreateInstance)(REFIID riid, void **ret_iface);
+        HRESULT (*fnCreateInstance)(REFIID riid, void **ret_iface);
 } IClassFactoryImpl;
 
-static HRESULT WINAPI create_direct_music_section(REFIID riid, void **ret_iface)
+static HRESULT create_direct_music_section(REFIID riid, void **ret_iface)
 {
         FIXME("(%s, %p) stub\n", debugstr_dmguid(riid), ret_iface);
 
diff --git a/dlls/dmstyle/dmstyle_private.h b/dlls/dmstyle/dmstyle_private.h
index 2956dad1513..4c8dd091536 100644
--- a/dlls/dmstyle/dmstyle_private.h
+++ b/dlls/dmstyle/dmstyle_private.h
@@ -44,13 +44,13 @@
 /*****************************************************************************
  * ClassFactory
  */
-extern HRESULT WINAPI create_dmstyle(REFIID lpcGUID, LPVOID* ppobj) DECLSPEC_HIDDEN;
-extern HRESULT WINAPI create_dmauditiontrack(REFIID riid, void **ret_iface) DECLSPEC_HIDDEN;
-extern HRESULT WINAPI create_dmchordtrack(REFIID riid, void **ret_iface) DECLSPEC_HIDDEN;
-extern HRESULT WINAPI create_dmcommandtrack(REFIID riid, void **ret_iface) DECLSPEC_HIDDEN;
-extern HRESULT WINAPI create_dmmotiftrack(REFIID riid, void **ret_iface) DECLSPEC_HIDDEN;
-extern HRESULT WINAPI create_dmmutetrack(REFIID riid, void **ret_iface) DECLSPEC_HIDDEN;
-extern HRESULT WINAPI create_dmstyletrack(REFIID riid, void **ret_iface) DECLSPEC_HIDDEN;
+extern HRESULT create_dmstyle(REFIID riid, void **ret_iface) DECLSPEC_HIDDEN;
+extern HRESULT create_dmauditiontrack(REFIID riid, void **ret_iface) DECLSPEC_HIDDEN;
+extern HRESULT create_dmchordtrack(REFIID riid, void **ret_iface) DECLSPEC_HIDDEN;
+extern HRESULT create_dmcommandtrack(REFIID riid, void **ret_iface) DECLSPEC_HIDDEN;
+extern HRESULT create_dmmotiftrack(REFIID riid, void **ret_iface) DECLSPEC_HIDDEN;
+extern HRESULT create_dmmutetrack(REFIID riid, void **ret_iface) DECLSPEC_HIDDEN;
+extern HRESULT create_dmstyletrack(REFIID riid, void **ret_iface) DECLSPEC_HIDDEN;
 
 /*****************************************************************************
  * Auxiliary definitions
diff --git a/dlls/dmstyle/motiftrack.c b/dlls/dmstyle/motiftrack.c
index 0fa1a48bcc4..5efe90706e0 100644
--- a/dlls/dmstyle/motiftrack.c
+++ b/dlls/dmstyle/motiftrack.c
@@ -288,7 +288,7 @@ static const IPersistStreamVtbl persiststream_vtbl = {
 };
 
 /* for ClassFactory */
-HRESULT WINAPI create_dmmotiftrack(REFIID lpcGUID, void **ppobj)
+HRESULT create_dmmotiftrack(REFIID lpcGUID, void **ppobj)
 {
     IDirectMusicMotifTrack *track;
     HRESULT hr;
diff --git a/dlls/dmstyle/mutetrack.c b/dlls/dmstyle/mutetrack.c
index 08fed5d5f2a..2248d7151dd 100644
--- a/dlls/dmstyle/mutetrack.c
+++ b/dlls/dmstyle/mutetrack.c
@@ -297,7 +297,7 @@ static const IPersistStreamVtbl persiststream_vtbl = {
 };
 
 /* for ClassFactory */
-HRESULT WINAPI create_dmmutetrack(REFIID lpcGUID, void **ppobj)
+HRESULT create_dmmutetrack(REFIID lpcGUID, void **ppobj)
 {
     IDirectMusicMuteTrack *track;
     HRESULT hr;
diff --git a/dlls/dmstyle/style.c b/dlls/dmstyle/style.c
index 9048984adea..ae939f8b738 100644
--- a/dlls/dmstyle/style.c
+++ b/dlls/dmstyle/style.c
@@ -973,7 +973,7 @@ static const IPersistStreamVtbl persiststream_vtbl = {
 };
 
 /* for ClassFactory */
-HRESULT WINAPI create_dmstyle(REFIID lpcGUID, void **ppobj)
+HRESULT create_dmstyle(REFIID lpcGUID, void **ppobj)
 {
   IDirectMusicStyle8Impl* obj;
   HRESULT hr;
diff --git a/dlls/dmstyle/styletrack.c b/dlls/dmstyle/styletrack.c
index a1e31bcd3b4..bdc665fe302 100644
--- a/dlls/dmstyle/styletrack.c
+++ b/dlls/dmstyle/styletrack.c
@@ -502,7 +502,7 @@ static const IPersistStreamVtbl persiststream_vtbl = {
 };
 
 /* for ClassFactory */
-HRESULT WINAPI create_dmstyletrack(REFIID lpcGUID, void **ppobj)
+HRESULT create_dmstyletrack(REFIID lpcGUID, void **ppobj)
 {
     IDirectMusicStyleTrack *track;
     HRESULT hr;