diff --git a/reactos/drivers/ksfilter/ks/irp.c b/reactos/drivers/ksfilter/ks/irp.c
index df6b3b26ad7..2603701b9b1 100644
--- a/reactos/drivers/ksfilter/ks/irp.c
+++ b/reactos/drivers/ksfilter/ks/irp.c
@@ -1206,8 +1206,8 @@ FindMatchingCreateItem(
     return STATUS_NOT_FOUND;
 }
 
-NTAPI
 NTSTATUS
+NTAPI
 KspCreate(
     IN  PDEVICE_OBJECT DeviceObject,
     IN  PIRP Irp)
@@ -1390,8 +1390,8 @@ RosDeviceInterfaceReferenceStringHack(
 
 }
 
-NTAPI
 NTSTATUS
+NTAPI
 KspDeviceControl(
     IN  PDEVICE_OBJECT DeviceObject,
     IN  PIRP Irp)
@@ -1425,8 +1425,8 @@ KspDeviceControl(
     return ObjectHeader->DispatchTable.DeviceIoControl(DeviceObject, Irp);
 }
 
-NTAPI
 NTSTATUS
+NTAPI
 KspDispatchIrp(
     IN  PDEVICE_OBJECT DeviceObject,
     IN  PIRP Irp)
diff --git a/reactos/drivers/wdm/audio/backpln/portcls/interrupt.c b/reactos/drivers/wdm/audio/backpln/portcls/interrupt.c
index 9fbafccc693..cb3ea1b2755 100644
--- a/reactos/drivers/wdm/audio/backpln/portcls/interrupt.c
+++ b/reactos/drivers/wdm/audio/backpln/portcls/interrupt.c
@@ -154,8 +154,8 @@ IInterruptSync_fnCallSynchronizedRoutine(
         return STATUS_UNSUCCESSFUL;
 }
 
-NTAPI
 PKINTERRUPT
+NTAPI
 IInterruptSync_fnGetKInterrupt(
     IN IInterruptSync * iface)
 {
diff --git a/reactos/drivers/wdm/audio/backpln/portcls/private.h b/reactos/drivers/wdm/audio/backpln/portcls/private.h
index 8d626452d0b..0b3df66032a 100644
--- a/reactos/drivers/wdm/audio/backpln/portcls/private.h
+++ b/reactos/drivers/wdm/audio/backpln/portcls/private.h
@@ -26,11 +26,6 @@
 #define TAG(A, B, C, D) (ULONG)(((A)<<0) + ((B)<<8) + ((C)<<16) + ((D)<<24))
 #define TAG_PORTCLASS TAG('P', 'C', 'L', 'S')
 
-#ifdef _MSC_VER
-  #define STDCALL
-  #define DDKAPI
-#endif
-
 #define ASSERT_IRQL(x) ASSERT(KeGetCurrentIrql() <= (x))
 
 NTSTATUS
diff --git a/reactos/include/ddk/portcls.h b/reactos/include/ddk/portcls.h
index 2496223cf42..9481dcf4532 100644
--- a/reactos/include/ddk/portcls.h
+++ b/reactos/include/ddk/portcls.h
@@ -239,7 +239,7 @@ struct _PCPROPERTY_REQUEST;
 
 typedef struct _PCPROPERTY_REQUEST PCPROPERTY_REQUEST, *PPCPROPERTY_REQUEST;
 
-typedef NTSTATUS NTAPI(*PCPFNPROPERTY_HANDLER)(
+typedef NTSTATUS (NTAPI *PCPFNPROPERTY_HANDLER)(
     IN  PPCPROPERTY_REQUEST PropertyRequest);
 
 typedef struct
@@ -281,7 +281,7 @@ struct _PCPROPERTY_REQUEST
 
 struct _PCEVENT_REQUEST;
 
-typedef NTSTATUS NTAPI(*PCPFNEVENT_HANDLER)(
+typedef NTSTATUS (NTAPI *PCPFNEVENT_HANDLER)(
     IN  struct _PCEVENT_REQUEST* EventRequest);
 
 typedef struct _PCEVENT_ITEM
@@ -307,7 +307,7 @@ typedef struct _PCEVENT_REQUEST
 
 struct _PCMETHOD_REQUEST;
 
-typedef NTSTATUS NTAPI(*PCPFNMETHOD_HANDLER)(
+typedef NTSTATUS (NTAPI *PCPFNMETHOD_HANDLER)(
     IN  struct _PCMETHOD_REQUEST* MethodRequest);
 
 typedef struct _PCMETHOD_ITEM
@@ -834,7 +834,7 @@ typedef enum
 
 struct IInterruptSync;
 
-typedef NTSTATUS NTAPI(*PINTERRUPTSYNCROUTINE)(
+typedef NTSTATUS (NTAPI *PINTERRUPTSYNCROUTINE)(
     IN  struct IInterruptSync* InterruptSync,
     IN  PVOID DynamicContext);
 
@@ -2048,7 +2048,7 @@ typedef IPortClsVersion *PPORTCLSVERSION;
     PortCls API Functions
 */
 
-typedef NTSTATUS NTAPI(*PCPFNSTARTDEVICE)(
+typedef NTSTATUS (NTAPI *PCPFNSTARTDEVICE)(
     IN  PDEVICE_OBJECT DeviceObject,
     IN  PIRP Irp,
     IN  PRESOURCELIST ResourceList);
diff --git a/reactos/include/ddk/stdunk.h b/reactos/include/ddk/stdunk.h
index 11d48875367..b01ebb4f522 100644
--- a/reactos/include/ddk/stdunk.h
+++ b/reactos/include/ddk/stdunk.h
@@ -94,20 +94,20 @@ class CUnknown : public INonDelegatingUnknown
 
 #else   /* Not C++ - this is probably very buggy... */
 
-STDMETHODCALLTYPE
 NTSTATUS
+STDMETHODCALLTYPE
 Unknown_QueryInterface(
     IUnknown* this,
     IN  REFIID refiid,
     OUT PVOID* output);
 
-STDMETHODCALLTYPE
 ULONG
+STDMETHODCALLTYPE
 Unknown_AddRef(
     IUnknown* unknown_this);
 
-STDMETHODCALLTYPE
 ULONG
+STDMETHODCALLTYPE
 Unknown_Release(
     IUnknown* unknown_this);
 
diff --git a/reactos/include/psdk/ks.h b/reactos/include/psdk/ks.h
index 4fbc31edc38..ee61049ae6d 100644
--- a/reactos/include/psdk/ks.h
+++ b/reactos/include/psdk/ks.h
@@ -1104,7 +1104,7 @@ typedef enum
 
 #if defined(_NTDDK_)
 /* MOVE ME */
-typedef NTSTATUS NTAPI NTAPI (*PFNKSCONTEXT_DISPATCH)(
+typedef NTSTATUS (NTAPI *PFNKSCONTEXT_DISPATCH)(
     IN PVOID Context,
     IN PIRP Irp);
 #endif
@@ -1260,21 +1260,19 @@ typedef struct
 
 typedef 
 VOID
-NTAPI
-(*PFNREFERENCEDEVICEOBJECT)( 
+(NTAPI *PFNREFERENCEDEVICEOBJECT)( 
     IN PVOID Context
     );
     
 typedef 
 VOID
-NTAPI
-(*PFNDEREFERENCEDEVICEOBJECT)( 
+(NTAPI *PFNDEREFERENCEDEVICEOBJECT)( 
     IN PVOID Context
     );
     
 typedef
 NTSTATUS
-(*PFNQUERYREFERENCESTRING)( 
+(NTAPI *PFNQUERYREFERENCESTRING)( 
     IN PVOID Context,
     IN OUT PWCHAR *String
     );
@@ -1438,7 +1436,7 @@ typedef struct {
 } KSPROPERTY_VALUES, *PKSPROPERTY_VALUES;
 
 #if defined(_NTDDK_)
-typedef NTSTATUS NTAPI(*PFNKSHANDLER)(
+typedef NTSTATUS (NTAPI *PFNKSHANDLER)(
     IN  PIRP Irp,
     IN  PKSIDENTIFIER Request,
     IN  OUT PVOID Data);
@@ -1467,8 +1465,7 @@ typedef struct
 
 typedef
 BOOLEAN
-NTAPI
-(*PFNKSFASTHANDLER)(
+(NTAPI *PFNKSFASTHANDLER)(
     IN PFILE_OBJECT FileObject,
     IN PKSIDENTIFIER Request,
     IN ULONG RequestLength,
@@ -1870,15 +1867,14 @@ typedef struct
     LONGLONG        Interval;
 } KSEVENT_TIME_INTERVAL, *PKSEVENT_TIME_INTERVAL;
 
-typedef NTSTATUS NTAPI (*PFNKSADDEVENT)(
+typedef NTSTATUS (NTAPI *PFNKSADDEVENT)(
     IN  PIRP Irp,
     IN  PKSEVENTDATA EventData,
     IN  struct _KSEVENT_ENTRY* EventEntry);
 
 typedef
 VOID
-NTAPI
-(*PFNKSREMOVEEVENT)(
+(NTAPI *PFNKSREMOVEEVENT)(
     IN PFILE_OBJECT FileObject,
     IN struct _KSEVENT_ENTRY* EventEntry
     );
@@ -1941,8 +1937,7 @@ typedef struct {
 
 typedef
 NTSTATUS
-NTAPI
-(*PFNKSPINHANDSHAKE)(
+(NTAPI *PFNKSPINHANDSHAKE)(
     IN PKSPIN Pin,
     IN PKSHANDSHAKE In,
     IN PKSHANDSHAKE Out
@@ -1950,16 +1945,14 @@ NTAPI
 
 typedef
 void
-NTAPI
-(*PFNKSPINPOWER)(
+(NTAPI *PFNKSPINPOWER)(
     IN PKSPIN Pin,
     IN DEVICE_POWER_STATE State
     );
 
 typedef
 void
-NTAPI
-(*PFNKSPINFRAMERETURN)(
+(NTAPI *PFNKSPINFRAMERETURN)(
     IN PKSPIN Pin,
     IN PVOID Data OPTIONAL,
     IN ULONG Size OPTIONAL,
@@ -1970,38 +1963,33 @@ NTAPI
 
 typedef
 void
-NTAPI
-(*PFNKSPINIRPCOMPLETION)(
+(NTAPI *PFNKSPINIRPCOMPLETION)(
     IN PKSPIN Pin,
     IN PIRP Irp
     );
 
 typedef
 NTSTATUS
-NTAPI
-(*PFNKSPINIRP)(
+(NTAPI *PFNKSPINIRP)(
     IN PKSPIN Pin,
     IN PIRP Irp
     );
 
 typedef
 NTSTATUS
-NTAPI
-(*PFNKSPIN)(
+(NTAPI *PFNKSPIN)(
     IN PKSPIN Pin
     );
 
 typedef
 void
-NTAPI
-(*PFNKSPINVOID)(
+(NTAPI *PFNKSPINVOID)(
     IN PKSPIN Pin
     );
 
 typedef
 void
-NTAPI
-(*PFNKSSTREAMPOINTER)(
+(NTAPI *PFNKSSTREAMPOINTER)(
     IN PKSSTREAM_POINTER StreamPointer
     );
 
@@ -2012,8 +2000,7 @@ typedef struct {
 
 typedef
 NTSTATUS
-NTAPI
-(*PFNKSPINSETDATAFORMAT)(
+(NTAPI *PFNKSPINSETDATAFORMAT)(
     IN PKSPIN Pin,
     IN PKSDATAFORMAT OldFormat OPTIONAL,
     IN PKSMULTIPLE_ITEM OldAttributeList OPTIONAL,
@@ -2023,8 +2010,7 @@ NTAPI
 
 typedef
 NTSTATUS
-NTAPI
-(*PFNKSPINSETDEVICESTATE)(
+(NTAPI *PFNKSPINSETDEVICESTATE)(
     IN PKSPIN Pin,
     IN KSSTATE ToState,
     IN KSSTATE FromState
@@ -2049,7 +2035,7 @@ typedef struct
 
 typedef
 BOOLEAN
-NTAPI (*PFNKSPINSETTIMER)(
+(NTAPI *PFNKSPINSETTIMER)(
     IN PKSPIN Pin,
     IN PKTIMER Timer,
     IN LARGE_INTEGER DueTime,
@@ -2058,7 +2044,7 @@ NTAPI (*PFNKSPINSETTIMER)(
 
 typedef
 BOOLEAN
-NTAPI (*PFNKSPINCANCELTIMER)(
+(NTAPI *PFNKSPINCANCELTIMER)(
     IN PKSPIN Pin,
     IN PKTIMER Timer
     );
@@ -2072,7 +2058,7 @@ LONGLONG
 
 typedef
 void
-NTAPI (*PFNKSPINRESOLUTION)(
+(NTAPI *PFNKSPINRESOLUTION)(
     IN PKSPIN Pin,
     OUT PKSRESOLUTION Resolution
     );
@@ -2086,19 +2072,19 @@ struct _KSCLOCK_DISPATCH {
 
 typedef
 NTSTATUS
-NTAPI (*PFNKSPININITIALIZEALLOCATOR)(
+(NTAPI *PFNKSPININITIALIZEALLOCATOR)(
     IN PKSPIN Pin,
     IN PKSALLOCATOR_FRAMING AllocatorFraming,
     OUT PVOID* Context
     );
 
-typedef PVOID NTAPI (*PFNKSDELETEALLOCATOR)(
+typedef PVOID (NTAPI *PFNKSDELETEALLOCATOR)(
     IN  PVOID Context);
 
-typedef PVOID NTAPI (*PFNKSDEFAULTALLOCATE)(
+typedef PVOID (NTAPI *PFNKSDEFAULTALLOCATE)(
     IN  PVOID Context);
 
-typedef PVOID NTAPI (*PFNKSDEFAULTFREE)(
+typedef PVOID (NTAPI *PFNKSDEFAULTFREE)(
     IN  PVOID Context,
     IN  PVOID Buffer);
 
@@ -2150,7 +2136,7 @@ typedef struct
 
 typedef
 NTSTATUS
-NTAPI (*PFNKSINTERSECTHANDLER)(
+(NTAPI *PFNKSINTERSECTHANDLER)(
     IN PIRP Irp,
     IN PKSP_PIN Pin,
     IN PKSDATARANGE DataRange,
@@ -2159,7 +2145,7 @@ NTAPI (*PFNKSINTERSECTHANDLER)(
 
 typedef
 NTSTATUS
-NTAPI (*PFNKSINTERSECTHANDLEREX)(
+(NTAPI *PFNKSINTERSECTHANDLEREX)(
     IN PVOID Context,
     IN PIRP Irp,
     IN PKSP_PIN Pin,
@@ -2380,7 +2366,7 @@ DEFINE_KSPROPERTY_TABLE(PinSet) {\
 
 typedef
 void
-NTAPI (*PFNKSFREE)(
+(NTAPI *PFNKSFREE)(
     IN PVOID Data
     );
 
@@ -2472,18 +2458,18 @@ DEFINE_KSPROPERTY_TABLE(TopologySet) {\
 /* TODO */
 typedef void* UNKNOWN;
 
-typedef PVOID NTAPI(*PFNKSINITIALIZEALLOCATOR)(
+typedef PVOID (NTAPI *PFNKSINITIALIZEALLOCATOR)(
     IN  PVOID InitialContext,
     IN  PKSALLOCATOR_FRAMING AllocatorFraming,
     OUT PVOID* Context);
 
 #if defined(_NTDDK_)
-typedef NTSTATUS NTAPI (*PFNKSALLOCATOR)(
+typedef NTSTATUS (NTAPI *PFNKSALLOCATOR)(
     IN  PIRP Irp,
     IN  ULONG BufferSize,
     IN  BOOLEAN InputOperation);
 
-typedef NTSTATUS NTAPI (*PFNKINTERSECTHANDLEREX)(
+typedef NTSTATUS (NTAPI *PFNKINTERSECTHANDLEREX)(
     IN  PVOID Context,
     IN  PIRP Irp,
     IN  PKSP_PIN Pin,
@@ -2496,16 +2482,14 @@ typedef NTSTATUS NTAPI (*PFNKINTERSECTHANDLEREX)(
 
 typedef
 NTSTATUS
-NTAPI
-NTAPI (*PFNALLOCATOR_ALLOCATEFRAME)(
+(NTAPI *PFNALLOCATOR_ALLOCATEFRAME)(
     IN PFILE_OBJECT FileObject,
     PVOID *Frame
     );
 
 typedef
 VOID
-NTAPI
-NTAPI (*PFNALLOCATOR_FREEFRAME)(
+(NTAPI *PFNALLOCATOR_FREEFRAME)(
     IN PFILE_OBJECT FileObject,
     IN PVOID Frame
     );
@@ -2632,32 +2616,32 @@ typedef struct _KSNODE_DESCRIPTOR KSNODE_DESCRIPTOR, *PKSNODE_DESCRIPTOR;
 typedef struct _KSFILTER_DESCRIPTOR KSFILTER_DESCRIPTOR, *PKSFILTER_DESCRIPTOR;
 typedef struct _KSDEVICE_DESCRIPTOR KSDEVICE_DESCRIPTOR, *PKSDEVICE_DESCRIPTOR;
 
-typedef NTSTATUS NTAPI (*PFNKSDEVICECREATE)(
+typedef NTSTATUS (NTAPI *PFNKSDEVICECREATE)(
     IN PKSDEVICE Device);
 
-typedef NTSTATUS NTAPI (*PFNKSDEVICEPNPSTART)(
+typedef NTSTATUS (NTAPI *PFNKSDEVICEPNPSTART)(
     IN PKSDEVICE Device,
     IN PIRP Irp,
     IN PCM_RESOURCE_LIST TranslatedResourceList OPTIONAL,
     IN PCM_RESOURCE_LIST UntranslatedResourceList OPTIONAL);
 
-typedef NTSTATUS NTAPI (*PFNKSDEVICE)(
+typedef NTSTATUS (NTAPI *PFNKSDEVICE)(
     IN PKSDEVICE Device);
 
-typedef NTSTATUS NTAPI (*PFNKSDEVICEIRP)(
+typedef NTSTATUS (NTAPI *PFNKSDEVICEIRP)(
     IN PKSDEVICE Device,
     IN PIRP Irp);
 
-typedef VOID NTAPI (*PFNKSDEVICEIRPVOID)(
+typedef VOID (NTAPI *PFNKSDEVICEIRPVOID)(
     IN PKSDEVICE Device,
     IN PIRP Irp);
 
-typedef NTSTATUS NTAPI (*PFNKSDEVICEQUERYCAPABILITIES)(
+typedef NTSTATUS (NTAPI *PFNKSDEVICEQUERYCAPABILITIES)(
     IN PKSDEVICE Device,
     IN PIRP Irp,
     IN OUT PDEVICE_CAPABILITIES Capabilities);
 
-typedef NTSTATUS NTAPI (*PFNKSDEVICEQUERYPOWER)(
+typedef NTSTATUS (NTAPI *PFNKSDEVICEQUERYPOWER)(
     IN PKSDEVICE Device,
     IN PIRP Irp,
     IN DEVICE_POWER_STATE DeviceTo,
@@ -2666,7 +2650,7 @@ typedef NTSTATUS NTAPI (*PFNKSDEVICEQUERYPOWER)(
     IN SYSTEM_POWER_STATE SystemFrom,
     IN POWER_ACTION Action);
 
-typedef VOID NTAPI (*PFNKSDEVICESETPOWER)(
+typedef VOID (NTAPI *PFNKSDEVICESETPOWER)(
     IN PKSDEVICE Device,
     IN PIRP Irp,
     IN DEVICE_POWER_STATE To,
@@ -2721,20 +2705,20 @@ struct _KSFILTER
 
 typedef
 void
-NTAPI (*PFNKSFILTERPOWER)(
+(NTAPI *PFNKSFILTERPOWER)(
     IN PKSFILTER Filter,
     IN DEVICE_POWER_STATE State
     );
 
-typedef NTSTATUS NTAPI (*PFNKSFILTERIRP)(
+typedef NTSTATUS (NTAPI *PFNKSFILTERIRP)(
     IN PKSFILTER Filter,
     IN PIRP Irp);
 
-typedef NTSTATUS NTAPI (*PFNKSFILTERPROCESS)(
+typedef NTSTATUS (NTAPI *PFNKSFILTERPROCESS)(
     IN PKSFILTER Filter,
     IN PKSPROCESSPIN_INDEXENTRY ProcessPinsIndex);
 
-typedef NTSTATUS NTAPI (*PFNKSFILTERVOID)(
+typedef NTSTATUS (NTAPI *PFNKSFILTERVOID)(
     IN PKSFILTER Filter);
 
 struct _KSFILTER_DISPATCH
@@ -2792,12 +2776,12 @@ struct _KSFILTERFACTORY {
     Minidriver Callbacks
 */
 #if defined(_NTDDK_)
-typedef NTSTATUS NTAPI (*KStrMethodHandler)(
+typedef NTSTATUS (NTAPI *KStrMethodHandler)(
     IN  PIRP Irp,
     IN  PKSIDENTIFIER Request,
     IN  OUT PVOID Data);
 
-typedef NTSTATUS NTAPI (*KStrSupportHandler)(
+typedef NTSTATUS (NTAPI *KStrSupportHandler)(
     IN  PIRP Irp,
     IN  PKSIDENTIFIER Request,
     IN  OUT PVOID Data);
@@ -2842,13 +2826,13 @@ KsValidateAllocatorFramingEx(
     Clock Functions
 */
 #if defined(_NTDDK_)
-typedef BOOLEAN NTAPI (*PFNKSSETTIMER)(
+typedef BOOLEAN (NTAPI *PFNKSSETTIMER)(
     IN  PVOID Context,
     IN  PKTIMER Timer,
     IN  LARGE_INTEGER DueTime,
     IN  PKDPC Dpc);
 
-typedef BOOLEAN NTAPI (*PFNKSCANCELTIMER)(
+typedef BOOLEAN (NTAPI *PFNKSCANCELTIMER)(
     IN  PVOID Context,
     IN  PKTIMER Timer);
 
@@ -3014,7 +2998,7 @@ KsFastPropertyHandler(
 
 typedef
 BOOLEAN
-NTAPI (*PFNKSGENERATEEVENTCALLBACK)(
+(NTAPI *PFNKSGENERATEEVENTCALLBACK)(
     IN PVOID Context,
     IN PKSEVENT_ENTRY EventEntry
     );
@@ -3165,7 +3149,7 @@ KsHandleSizedListQuery(
     IRP Helper Functions
 */
 
-typedef NTSTATUS NTAPI (*PFNKSIRPLISTCALLBACK)(
+typedef NTSTATUS (NTAPI *PFNKSIRPLISTCALLBACK)(
     IN  PIRP Irp,
     IN  PVOID Context);
 
@@ -3598,7 +3582,7 @@ KsInitializeDevice (
     IN const KSDEVICE_DESCRIPTOR*  Descriptor OPTIONAL);
 
 
-typedef void NTAPI (*PFNKSFILTERFACTORYPOWER)(
+typedef void (NTAPI *PFNKSFILTERFACTORYPOWER)(
     IN  PKSFILTERFACTORY FilterFactory,
     IN  DEVICE_POWER_STATE State);
 
@@ -3886,7 +3870,7 @@ NTAPI
 KsFilterAddTopologyConnections(
     IN  PKSFILTER Filter,
     IN  ULONG NewConnectionsCount,
-    IN  const KSTOPOLOGY_CONNECTION* NewTopologyConnections);
+    IN  const KSTOPOLOGY_CONNECTION *const NewTopologyConnections);
 
 KSDDKAPI
 VOID
@@ -3900,7 +3884,7 @@ NTSTATUS
 NTAPI
 KsFilterCreateNode(
     IN  PKSFILTER Filter,
-    IN  const KSNODE_DESCRIPTOR* NodeDescriptor,
+    IN  const KSNODE_DESCRIPTOR *const NodeDescriptor,
     OUT PULONG NodeID);
 
 KSDDKAPI
@@ -3908,7 +3892,7 @@ NTSTATUS
 NTAPI
 KsFilterCreatePinFactory(
     IN  PKSFILTER Filter,
-    IN  const KSPIN_DESCRIPTOR_EX* PinDescriptor,
+    IN  const KSPIN_DESCRIPTOR_EX *const PinDescriptor,
     OUT PULONG PinID);
 
 KSDDKAPI