Index: /trunk/src/VBox/Additions/WINNT/Graphics/Display/wddm/VBoxDispD3D.h
===================================================================
--- /trunk/src/VBox/Additions/WINNT/Graphics/Display/wddm/VBoxDispD3D.h	(revision 29433)
+++ /trunk/src/VBox/Additions/WINNT/Graphics/Display/wddm/VBoxDispD3D.h	(revision 29434)
@@ -44,5 +44,5 @@
 DECLINLINE(bool) vboxDispD3DIs3DEnabled(VBOXWDDMDISP_ADAPTER * pAdapter)
 {
-    return pAdapter->pD3D9If;
+    return !!(pAdapter->pD3D9If);
 }
 
Index: /trunk/src/VBox/Additions/WINNT/Graphics/Display/wddm/VBoxDispD3DIf.h
===================================================================
--- /trunk/src/VBox/Additions/WINNT/Graphics/Display/wddm/VBoxDispD3DIf.h	(revision 29433)
+++ /trunk/src/VBox/Additions/WINNT/Graphics/Display/wddm/VBoxDispD3DIf.h	(revision 29434)
@@ -20,5 +20,5 @@
 
 /* D3D functionality the VBOXDISPD3D provides */
-typedef HRESULT FNVBOXDISPD3DCREATE9EX(UINT SDKVersion, IDirect3D9Ex **ppD3D);
+typedef HRESULT WINAPI FNVBOXDISPD3DCREATE9EX(UINT SDKVersion, IDirect3D9Ex **ppD3D);
 typedef FNVBOXDISPD3DCREATE9EX *PFNVBOXDISPD3DCREATE9EX;