diff --git a/reactos/subsystems/win32/win32k/include/intddraw.h b/reactos/subsystems/win32/win32k/include/intddraw.h
index a2752d66cbb..eb0e1defb19 100644
--- a/reactos/subsystems/win32/win32k/include/intddraw.h
+++ b/reactos/subsystems/win32/win32k/include/intddraw.h
@@ -101,6 +101,12 @@ typedef DWORD (NTAPI *PGD_DXDDSETOVERLAYPOSITION)(HANDLE, HANDLE, PDD_SETOVERLAY
 /* From eng.c */
 typedef FLATPTR (NTAPI *PGD_HEAPVIDMEMALLOCALIGNED)(LPVIDMEM, DWORD, DWORD, LPSURFACEALIGNMENT, LPLONG);
 typedef VOID (NTAPI *PGD_VIDMEMFREE)(LPVMEMHEAP, FLATPTR);
+typedef PVOID (NTAPI *PGD_ENGALLOCPRIVATEUSERMEM)(PDD_SURFACE_LOCAL, SIZE_T, ULONG) ;
+typedef VOID (NTAPI *PGD_ENGFREEPRIVATEUSERMEM)(PDD_SURFACE_LOCAL, PVOID);
+typedef DWORD (NTAPI *PGD_ENGDXIOCTL)(ULONG, PVOID, ULONG);
+typedef PDD_SURFACE_LOCAL (NTAPI *PGD_ENGLOCKDIRECTDRAWSURFACE)(HANDLE);
+typedef BOOL (NTAPI *PGD_ENGUNLOCKDIRECTDRAWSURFACE)(PDD_SURFACE_LOCAL);
+
 
 /* Standard macro */
 #define DXG_GET_INDEX_FUNCTION(INDEX, FUNCTION) \
diff --git a/reactos/subsystems/win32/win32k/ntddraw/d3d.c b/reactos/subsystems/win32/win32k/ntddraw/d3d.c
index c5de4705177..67ea6e76985 100644
--- a/reactos/subsystems/win32/win32k/ntddraw/d3d.c
+++ b/reactos/subsystems/win32/win32k/ntddraw/d3d.c
@@ -258,7 +258,7 @@ NtGdiDdCreateD3DBuffer(HANDLE hDirectDraw,
                        PDD_CREATESURFACEDATA puCreateSurfaceData,
                        HANDLE *puhSurface)
 {
-    PGD_DDCREATED3DBUFFER pfnDdCreateD3DBuffer = (PGD_D3DCONTEXTDESTROYALL)gpDxFuncs[DXG_INDEX_DxDdCreateD3DBuffer].pfn;
+    PGD_DDCREATED3DBUFFER pfnDdCreateD3DBuffer = (PGD_DDCREATED3DBUFFER)gpDxFuncs[DXG_INDEX_DxDdCreateD3DBuffer].pfn;
 
     if (pfnDdCreateD3DBuffer == NULL)
     {
diff --git a/reactos/subsystems/win32/win32k/ntddraw/dxeng.c b/reactos/subsystems/win32/win32k/ntddraw/dxeng.c
index 29b0a5e49ca..925e25b9b9c 100644
--- a/reactos/subsystems/win32/win32k/ntddraw/dxeng.c
+++ b/reactos/subsystems/win32/win32k/ntddraw/dxeng.c
@@ -68,7 +68,7 @@ DxEngVisRgnUniq()
 /************************************************************************/
 /* Enumate all drivers in win32k */
 HDEV *
-DxEngEnumerateHdev(HDEV *hdev);
+DxEngEnumerateHdev(HDEV *hdev)
 {
     /* FIXME Enumate all drivers in win32k */
     DPRINT1("We do not enumate any device from win32k ");
diff --git a/reactos/subsystems/win32/win32k/ntddraw/eng.c b/reactos/subsystems/win32/win32k/ntddraw/eng.c
index d2b8cd3b060..429e116ffe9 100644
--- a/reactos/subsystems/win32/win32k/ntddraw/eng.c
+++ b/reactos/subsystems/win32/win32k/ntddraw/eng.c
@@ -33,7 +33,7 @@ HeapVidMemAllocAligned(LPVIDMEM lpVidMem,
     if (pfnHeapVidMemAllocAligned == NULL)
     {
         DPRINT1("Warring no pfnHeapVidMemAllocAligned");
-        return NULL;
+        return 0;
     }
 
     DPRINT1("Calling on dxg.sys pfnHeapVidMemAllocAligned");
@@ -104,11 +104,12 @@ EngFreePrivateUserMem(PDD_SURFACE_LOCAL  psl,
     if (pfnEngFreePrivateUserMem == NULL)
     {
         DPRINT1("Warring no pfnEngFreePrivateUserMem");
-        return DDHAL_DRIVER_NOTHANDLED;
     }
-
-    DPRINT1("Calling on dxg.sys pfnEngFreePrivateUserMem");
-    return pfnEngFreePrivateUserMem(psl, pv);
+    else
+    {
+        DPRINT1("Calling on dxg.sys pfnEngFreePrivateUserMem");
+        pfnEngFreePrivateUserMem(psl, pv);
+    }
 }
 
 /************************************************************************/
@@ -132,7 +133,7 @@ EngDxIoctl(ULONG ulIoctl,
     }
 
     DPRINT1("Calling on dxg.sys pfnEngDxIoctl");
-    return pfnEngFreePrivateUserMem(psl, pv);
+    return pfnEngDxIoctl(ulIoctl, pBuffer, ulBufferSize);
 }
 
 /************************************************************************/