diff --git a/build/VStudio/winfsp.vcxproj b/build/VStudio/winfsp.vcxproj
index 80158255..7de2a52d 100644
--- a/build/VStudio/winfsp.vcxproj
+++ b/build/VStudio/winfsp.vcxproj
@@ -96,22 +96,22 @@
   </PropertyGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
     <ClCompile>
-      <AdditionalIncludeDirectories>..\..\src;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>..\..\inc;..\..\src;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
     </ClCompile>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
     <ClCompile>
-      <AdditionalIncludeDirectories>..\..\src;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>..\..\inc;..\..\src;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
     </ClCompile>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
     <ClCompile>
-      <AdditionalIncludeDirectories>..\..\src;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>..\..\inc;..\..\src;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
     </ClCompile>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
     <ClCompile>
-      <AdditionalIncludeDirectories>..\..\src;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>..\..\inc;..\..\src;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
     </ClCompile>
   </ItemDefinitionGroup>
   <ItemGroup>
@@ -139,6 +139,7 @@
     <ClCompile Include="..\..\src\sys\write.c" />
   </ItemGroup>
   <ItemGroup>
+    <ClInclude Include="..\..\inc\fsctl.h" />
     <ClInclude Include="..\..\src\sys\driver.h" />
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
diff --git a/build/VStudio/winfsp.vcxproj.filters b/build/VStudio/winfsp.vcxproj.filters
index bb42f848..ad1f2ca1 100644
--- a/build/VStudio/winfsp.vcxproj.filters
+++ b/build/VStudio/winfsp.vcxproj.filters
@@ -1,81 +1,80 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup>
-    <Filter Include="Source Files">
+    <Filter Include="Source">
       <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
       <Extensions>cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
     </Filter>
-    <Filter Include="Header Files">
+    <Filter Include="Include">
       <UniqueIdentifier>{93995380-89BD-4b04-88EB-625FBE52EBFB}</UniqueIdentifier>
       <Extensions>h;hpp;hxx;hm;inl;inc;xsd</Extensions>
     </Filter>
-    <Filter Include="Resource Files">
-      <UniqueIdentifier>{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}</UniqueIdentifier>
-      <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms</Extensions>
-    </Filter>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="..\..\src\sys\cleanup.c">
-      <Filter>Source Files</Filter>
+      <Filter>Source</Filter>
     </ClCompile>
     <ClCompile Include="..\..\src\sys\close.c">
-      <Filter>Source Files</Filter>
+      <Filter>Source</Filter>
     </ClCompile>
     <ClCompile Include="..\..\src\sys\create.c">
-      <Filter>Source Files</Filter>
+      <Filter>Source</Filter>
     </ClCompile>
     <ClCompile Include="..\..\src\sys\debug.c">
-      <Filter>Source Files</Filter>
+      <Filter>Source</Filter>
     </ClCompile>
     <ClCompile Include="..\..\src\sys\devctl.c">
-      <Filter>Source Files</Filter>
+      <Filter>Source</Filter>
     </ClCompile>
     <ClCompile Include="..\..\src\sys\dirctl.c">
-      <Filter>Source Files</Filter>
+      <Filter>Source</Filter>
     </ClCompile>
     <ClCompile Include="..\..\src\sys\driver.c">
-      <Filter>Source Files</Filter>
+      <Filter>Source</Filter>
     </ClCompile>
     <ClCompile Include="..\..\src\sys\ea.c">
-      <Filter>Source Files</Filter>
+      <Filter>Source</Filter>
     </ClCompile>
     <ClCompile Include="..\..\src\sys\fastio.c">
-      <Filter>Source Files</Filter>
+      <Filter>Source</Filter>
     </ClCompile>
     <ClCompile Include="..\..\src\sys\fileinfo.c">
-      <Filter>Source Files</Filter>
+      <Filter>Source</Filter>
     </ClCompile>
     <ClCompile Include="..\..\src\sys\flush.c">
-      <Filter>Source Files</Filter>
+      <Filter>Source</Filter>
     </ClCompile>
     <ClCompile Include="..\..\src\sys\fsctl.c">
-      <Filter>Source Files</Filter>
+      <Filter>Source</Filter>
     </ClCompile>
     <ClCompile Include="..\..\src\sys\lockctl.c">
-      <Filter>Source Files</Filter>
+      <Filter>Source</Filter>
     </ClCompile>
     <ClCompile Include="..\..\src\sys\read.c">
-      <Filter>Source Files</Filter>
+      <Filter>Source</Filter>
     </ClCompile>
     <ClCompile Include="..\..\src\sys\resource.c">
-      <Filter>Source Files</Filter>
+      <Filter>Source</Filter>
     </ClCompile>
     <ClCompile Include="..\..\src\sys\security.c">
-      <Filter>Source Files</Filter>
+      <Filter>Source</Filter>
     </ClCompile>
     <ClCompile Include="..\..\src\sys\shutdown.c">
-      <Filter>Source Files</Filter>
+      <Filter>Source</Filter>
     </ClCompile>
     <ClCompile Include="..\..\src\sys\volinfo.c">
-      <Filter>Source Files</Filter>
+      <Filter>Source</Filter>
     </ClCompile>
     <ClCompile Include="..\..\src\sys\write.c">
-      <Filter>Source Files</Filter>
+      <Filter>Source</Filter>
     </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\..\src\sys\driver.h">
-      <Filter>Source Files</Filter>
+      <Filter>Source</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\inc\fsctl.h">
+      <Filter>Include</Filter>
     </ClInclude>
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/inc/fsctl.h b/inc/fsctl.h
new file mode 100644
index 00000000..699ce8f7
--- /dev/null
+++ b/inc/fsctl.h
@@ -0,0 +1,25 @@
+/**
+ * @file sys/fsctl.h
+ *
+ * @copyright 2015 Bill Zissimopoulos
+ */
+
+#ifndef WINFSP_FSCTL_H_INCLUDED
+#define WINFSP_FSCTL_H_INCLUDED
+
+#include <devioctl.h>
+
+#define FSP_FSCTL_DISK_DEVICE_NAME      "WinFsp.Disk"
+#define FSP_FSCTL_NET_DEVICE_NAME       "WinFsp.Net"
+
+/* fsctl device codes */
+#define FSP_FSCTL_CREATE                \
+    CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 0x800 + 'C', METHOD_BUFFERED, FILE_READ_DATA | FILE_WRITE_DATA)
+#define FSP_FSCTL_DELETE                \
+    CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 0x800 + 'D', METHOD_BUFFERED, FILE_READ_DATA | FILE_WRITE_DATA)
+
+/* fsvrt device codes */
+#define FSP_FSCTL_TRANSACT              \
+    CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 0x800 + 'T', METHOD_BUFFERED, FILE_READ_DATA | FILE_WRITE_DATA)
+
+#endif
diff --git a/src/sys/driver.c b/src/sys/driver.c
index dc8f2471..afb1207d 100644
--- a/src/sys/driver.c
+++ b/src/sys/driver.c
@@ -23,13 +23,13 @@ DriverEntry(
 
     /* create the file system control device objects */
     UNICODE_STRING DeviceName;
-    RtlInitUnicodeString(&DeviceName, L"\\Device\\" DISK_DEVICE_NAME);
+    RtlInitUnicodeString(&DeviceName, L"\\Device\\" FSP_FSCTL_DISK_DEVICE_NAME);
     Result = IoCreateDevice(DriverObject,
         sizeof(FSP_FSCTL_DEVICE_EXTENSION), &DeviceName, FILE_DEVICE_DISK_FILE_SYSTEM, 0, FALSE,
         &FspFsctlDiskDeviceObject);
     if (!NT_SUCCESS(Result))
         FSP_RETURN();
-    RtlInitUnicodeString(&DeviceName, L"\\Device\\" NET_DEVICE_NAME);
+    RtlInitUnicodeString(&DeviceName, L"\\Device\\" FSP_FSCTL_NET_DEVICE_NAME);
     Result = IoCreateDevice(DriverObject,
         sizeof(FSP_FSCTL_DEVICE_EXTENSION), &DeviceName, FILE_DEVICE_NETWORK_FILE_SYSTEM, 0, FALSE,
         &FspFsctlNetDeviceObject);
diff --git a/src/sys/driver.h b/src/sys/driver.h
index e275b656..9c7eb740 100644
--- a/src/sys/driver.h
+++ b/src/sys/driver.h
@@ -8,10 +8,9 @@
 #define WINFSP_SYS_DRIVER_H_INCLUDED
 
 #include <ntifs.h>
+#include <fsctl.h>
 
 #define DRIVER_NAME                     "WinFsp"
-#define DISK_DEVICE_NAME                "WinFsp.Disk"
-#define NET_DEVICE_NAME                 "WinFsp.Net"
 
 /* DEBUGLOG */
 #if DBG