diff --git a/reactos/drivers/net/npf/dump.c b/reactos/drivers/net/npf/dump.c
index 99f916b3d82..1f1b7545a5f 100644
--- a/reactos/drivers/net/npf/dump.c
+++ b/reactos/drivers/net/npf/dump.c
@@ -248,7 +248,7 @@ NPF_StartDump(POPEN_INSTANCE Open)
         THREAD_ALL_ACCESS,
         NULL,
         KernelMode,
-        &Open->DumpThreadObject,
+        (PVOID*)&Open->DumpThreadObject,
         0);
     if ( !NT_SUCCESS( ntStatus ) )
     {
diff --git a/reactos/drivers/net/npf/openclos.c b/reactos/drivers/net/npf/openclos.c
index 902afd0297d..bdb5b1a75c7 100644
--- a/reactos/drivers/net/npf/openclos.c
+++ b/reactos/drivers/net/npf/openclos.c
@@ -67,7 +67,8 @@ NDIS_SPIN_LOCK Opened_Instances_Lock;
 
 //-------------------------------------------------------------------
 
-NTSTATUS NPF_Open(IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp)
+NTSTATUS STDCALL
+NPF_Open(IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp)
 {
 
     PDEVICE_EXTENSION DeviceExtension;
@@ -380,7 +381,7 @@ VOID NPF_OpenAdapterComplete(
 
 //-------------------------------------------------------------------
 
-NTSTATUS
+NTSTATUS STDCALL
 NPF_Close(IN PDEVICE_OBJECT DeviceObject,IN PIRP Irp)
 {
 
diff --git a/reactos/drivers/net/npf/packet.c b/reactos/drivers/net/npf/packet.c
index dc063f58e41..17acc0b798a 100644
--- a/reactos/drivers/net/npf/packet.c
+++ b/reactos/drivers/net/npf/packet.c
@@ -593,7 +593,7 @@ BOOLEAN createDevice(IN OUT PDRIVER_OBJECT adriverObjectP,
 
 //-------------------------------------------------------------------
 
-VOID
+VOID STDCALL
 NPF_Unload(IN PDRIVER_OBJECT DriverObject)
 {
     PDEVICE_OBJECT     DeviceObject;
@@ -648,7 +648,7 @@ NPF_Unload(IN PDRIVER_OBJECT DriverObject)
 
 //-------------------------------------------------------------------
 
-NTSTATUS
+NTSTATUS STDCALL
 NPF_IoControl(IN PDEVICE_OBJECT DeviceObject,IN PIRP Irp)
 {
     POPEN_INSTANCE      Open;
@@ -1344,7 +1344,7 @@ NPF_ReadRegistry(
 
 //-------------------------------------------------------------------
 
-NTSTATUS
+NTSTATUS STDCALL
 NPF_QueryRegistryRoutine(
     IN PWSTR     ValueName,
     IN ULONG     ValueType,
diff --git a/reactos/drivers/net/npf/packet.h b/reactos/drivers/net/npf/packet.h
index a3582cca826..062a790b6d5 100644
--- a/reactos/drivers/net/npf/packet.h
+++ b/reactos/drivers/net/npf/packet.h
@@ -120,14 +120,14 @@
 
   This IOCTL is used to perform an OID set operation on the NIC driver. 
 */
-#define  BIOCSETOID 2147483648
+#define  BIOCSETOID 2147483648UL
 
 /*!
   \brief IOCTL code: get an OID value
 
   This IOCTL is used to perform an OID get operation on the NIC driver. 
 */
-#define  BIOCQUERYOID 2147483652
+#define  BIOCQUERYOID 2147483652UL
 
 /*!
   \brief IOCTL code: set the name of a the file used by kernel dump mode
@@ -455,7 +455,7 @@ BOOLEAN createDevice(
   and buffers needed by the new instance, fills the OPEN_INSTANCE structure associated with it and opens the 
   adapter with a call to NdisOpenAdapter.
 */
-NTSTATUS
+NTSTATUS STDCALL
 NPF_Open(
     IN PDEVICE_OBJECT DeviceObject,
     IN PIRP Irp
@@ -487,7 +487,7 @@ NPF_OpenAdapterComplete(
   It stops the capture/monitoring/dump process, deallocates the memory and the objects associated with the 
   instance and closing the files. The network adapter is then closed with a call to NdisCloseAdapter. 
 */
-NTSTATUS
+NTSTATUS STDCALL
 NPF_Close(
     IN PDEVICE_OBJECT DeviceObject,
     IN PIRP Irp
@@ -590,7 +590,7 @@ NPF_ReceiveComplete(IN NDIS_HANDLE  ProtocolBindingContext);
   - #BIOCSENDPACKETSSYNC
   - #BIOCSENDPACKETSNOSYNC
 */
-NTSTATUS
+NTSTATUS STDCALL
 NPF_IoControl(
     IN PDEVICE_OBJECT DeviceObject,
     IN PIRP Irp
@@ -625,7 +625,7 @@ NPF_RequestComplete(
   associated with Irp indicates the number of copies of the packet that will be sent: more than one copy of the
   packet can be sent for performance reasons.
 */
-NTSTATUS
+NTSTATUS STDCALL
 NPF_Write(
             IN PDEVICE_OBJECT DeviceObject,
             IN PIRP Irp
@@ -712,7 +712,7 @@ NPF_StatusComplete(IN NDIS_HANDLE  ProtocolBindingContext);
   delete the devices and deregisters the protocol. The driver can be unloaded by the user stopping the NPF
   service (from control panel or with a console 'net stop npf').
 */
-VOID
+VOID STDCALL
 NPF_Unload(IN PDRIVER_OBJECT DriverObject);
 
 
@@ -734,7 +734,7 @@ NPF_Unload(IN PDRIVER_OBJECT DriverObject);
   - If the instance is in statistical mode or in dump mode, the application's request is blocked until the 
   timeout kept in OPEN_INSTANCE::TimeOut expires.
 */
-NTSTATUS
+NTSTATUS STDCALL
 NPF_Read(
     IN PDEVICE_OBJECT DeviceObject,
     IN PIRP Irp
@@ -758,7 +758,7 @@ NPF_ReadRegistry(
 
   Normally not used in recent versions of NPF.
 */
-NTSTATUS
+NTSTATUS STDCALL
 NPF_QueryRegistryRoutine(
     IN PWSTR     ValueName,
     IN ULONG     ValueType,
diff --git a/reactos/drivers/net/npf/read.c b/reactos/drivers/net/npf/read.c
index e456f1a4cb6..75417440b0f 100644
--- a/reactos/drivers/net/npf/read.c
+++ b/reactos/drivers/net/npf/read.c
@@ -96,7 +96,7 @@ UINT n,i,NBlocks;
 
 //-------------------------------------------------------------------
 
-NTSTATUS
+NTSTATUS STDCALL
 NPF_Read(IN PDEVICE_OBJECT DeviceObject,IN PIRP Irp)
 {
     POPEN_INSTANCE      Open;
diff --git a/reactos/drivers/net/npf/write.c b/reactos/drivers/net/npf/write.c
index 0db9e019dca..c3c5eb578c0 100644
--- a/reactos/drivers/net/npf/write.c
+++ b/reactos/drivers/net/npf/write.c
@@ -41,7 +41,7 @@
 
 //-------------------------------------------------------------------
 
-NTSTATUS
+NTSTATUS STDCALL
 NPF_Write(
     IN PDEVICE_OBJECT DeviceObject,
     IN PIRP Irp