diff --git a/reactos/w32api/include/dxdiag.h b/reactos/w32api/include/dxdiag.h
new file mode 100644
index 00000000000..7cfaeba113a
--- /dev/null
+++ b/reactos/w32api/include/dxdiag.h
@@ -0,0 +1,112 @@
+
+
+#ifndef _DXDIAG_H_
+#define _DXDIAG_H_
+
+#include <ole2.h> 
+
+#define DXDIAG_DX9_SDK_VERSION 111
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct IDxDiagProvider *LPDXDIAGPROVIDER, *PDXDIAGPROVIDER;
+typedef struct IDxDiagContainer *LPDXDIAGCONTAINER, *PDXDIAGCONTAINER;
+
+DEFINE_GUID(CLSID_DxDiagProvider, 0xA65B8071, 0x3BFE, 0x4213, 0x9A, 0x5B, 0x49, 0x1D, 0xA4, 0x46, 0x1C, 0xA7);
+DEFINE_GUID(IID_IDxDiagProvider,  0x9C6B4CB0, 0x23F8, 0x49CC, 0xA3, 0xED, 0x45, 0xA5, 0x50, 0x00, 0xA6, 0xD2);
+DEFINE_GUID(IID_IDxDiagContainer, 0x7D0F462F, 0x4064, 0x4862, 0xBC, 0x7F, 0x93, 0x3E, 0x50, 0x58, 0xC1, 0x0F);
+
+
+#define DXDIAG_E_INSUFFICIENT_BUFFER ((HRESULT)0x8007007A)  
+
+
+
+typedef struct _DXDIAG_INIT_PARAMS
+{
+    DWORD   dwSize;  
+    DWORD   dwDxDiagHeaderVersion;                                  
+    BOOL    bAllowWHQLChecks;                                                                         
+    VOID*   pReserved;            
+} DXDIAG_INIT_PARAMS;
+
+
+#undef INTERFACE   
+#define INTERFACE IDxDiagContainer
+DECLARE_INTERFACE_(IDxDiagContainer,IUnknown)
+{
+    STDMETHOD(QueryInterface)               (THIS_ REFIID riid, LPVOID *ppvObj) PURE;
+    STDMETHOD_(ULONG,AddRef)                (THIS) PURE;
+    STDMETHOD_(ULONG,Release)               (THIS) PURE;    
+    STDMETHOD(GetNumberOfChildContainers)   (THIS_ DWORD *pdwCount) PURE;
+    STDMETHOD(EnumChildContainerNames)      (THIS_ DWORD dwIndex, LPWSTR pwszContainer, DWORD cchContainer) PURE;
+    STDMETHOD(GetChildContainer)            (THIS_ LPCWSTR pwszContainer, IDxDiagContainer **ppInstance) PURE;  
+    STDMETHOD(GetNumberOfProps)             (THIS_ DWORD *pdwCount) PURE;
+    STDMETHOD(EnumPropNames)                (THIS_ DWORD dwIndex, LPWSTR pwszPropName, DWORD cchPropName) PURE;
+    STDMETHOD(GetProp)                      (THIS_ LPCWSTR pwszPropName, VARIANT *pvarProp) PURE;
+};
+
+#undef INTERFACE     
+#define INTERFACE IDxDiagProvider
+DECLARE_INTERFACE_(IDxDiagProvider,IUnknown)
+{
+    /*** IUnknown methods ***/
+    STDMETHOD(QueryInterface)               (THIS_ REFIID riid, LPVOID *ppvObj) PURE;
+    STDMETHOD_(ULONG,AddRef)                (THIS) PURE;
+    STDMETHOD_(ULONG,Release)               (THIS) PURE;
+    
+    /*** IDxDiagProvider methods ***/
+    STDMETHOD(Initialize)                   (THIS_ DXDIAG_INIT_PARAMS* pParams) PURE; 
+    STDMETHOD(GetRootContainer)             (THIS_ IDxDiagContainer **ppInstance) PURE;
+};
+
+
+
+
+
+#if defined(__cplusplus) || !defined(CINTERFACE)
+
+#define IDxDiagProvider_QueryInterface(p,a,b)                   (p)->QueryInterface(p,a,b)
+#define IDxDiagProvider_AddRef(p)                               (p)->AddRef(p)
+#define IDxDiagProvider_Release(p)                              (p)->Release(p)
+#define IDxDiagProvider_Initialize(p,a,b)                       (p)->Initialize(p,a,b)
+#define IDxDiagProvider_GetRootContainer(p,a)                   (p)->GetRootContainer(p,a)
+
+#define IDxDiagContainer_QueryInterface(p,a,b)                  (p)->QueryInterface(p,a,b)
+#define IDxDiagContainer_AddRef(p)                              (p)->AddRef(p)
+#define IDxDiagContainer_Release(p)                             (p)->Release(p)
+#define IDxDiagContainer_GetNumberOfChildContainers(p,a)        (p)->GetNumberOfChildContainers(p,a)
+#define IDxDiagContainer_EnumChildContainerNames(p,a,b,c)       (p)->EnumChildContainerNames(p,a,b,c)
+#define IDxDiagContainer_GetChildContainer(p,a,b)               (p)->GetChildContainer(p,a,b)
+#define IDxDiagContainer_GetNumberOfProps(p,a)                  (p)->GetNumberOfProps(p,a)
+#define IDxDiagContainer_EnumProps(p,a,b)                       (p)->EnumProps(p,a,b,c)
+#define IDxDiagContainer_GetProp(p,a,b)                         (p)->GetProp(p,a,b)
+
+#else
+
+#define IDxDiagProvider_QueryInterface(p,a,b)             (p)->lpVtbl->QueryInterface(p,a,b)
+#define IDxDiagProvider_AddRef(p)                         (p)->lpVtbl->AddRef(p)
+#define IDxDiagProvider_Release(p)                        (p)->lpVtbl->Release(p)
+#define IDxDiagProvider_Initialize(p,a,b)                 (p)->lpVtbl->Initialize(p,a,b)
+#define IDxDiagProvider_GetRootContainer(p,a)             (p)->lpVtbl->GetRootContainer(p,a)
+#define IDxDiagContainer_QueryInterface(p,a,b)            (p)->lpVtbl->QueryInterface(p,a,b)
+#define IDxDiagContainer_AddRef(p)                        (p)->lpVtbl->AddRef(p)
+#define IDxDiagContainer_Release(p)                       (p)->lpVtbl->Release(p)
+#define IDxDiagContainer_GetNumberOfChildContainers(p,a)  (p)->lpVtbl->GetNumberOfChildContainers(p,a)
+#define IDxDiagContainer_EnumChildContainerNames(p,a,b,c) (p)->lpVtbl->EnumChildContainerNames(p,a,b,c)
+#define IDxDiagContainer_GetChildContainer(p,a,b)         (p)->lpVtbl->GetChildContainer(p,a,b)
+#define IDxDiagContainer_GetNumberOfProps(p,a)            (p)->lpVtbl->GetNumberOfProps(p,a)
+#define IDxDiagContainer_EnumProps(p,a,b)                 (p)->lpVtbl->EnumProps(p,a,b,c)
+#define IDxDiagContainer_GetProp(p,a,b)                   (p)->lpVtbl->GetProp(p,a,b)
+
+#endif
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif 
+
+