diff --git a/include/textserv.h b/include/textserv.h
index 3abdcee6a30..6198f6900ff 100644
--- a/include/textserv.h
+++ b/include/textserv.h
@@ -31,6 +31,7 @@ extern "C" {
 
 EXTERN_C const IID IID_ITextServices;
 EXTERN_C const IID IID_ITextHost;
+EXTERN_C const IID IID_ITextHost2;
 
 /*****************************************************************************
  * ITextServices interface
@@ -364,6 +365,80 @@ DECLARE_INTERFACE_(ITextHost,IUnknown)
 #define ITextHost_Release(p) (p)->lpVtbl->Release(p)
 #endif
 
+/*****************************************************************************
+ * ITextHost2 interface
+ */
+#define INTERFACE ITextHost2
+DECLARE_INTERFACE_(ITextHost2,ITextHost)
+{
+    /*** IUnknown methods ***/
+    STDMETHOD(QueryInterface)( THIS_ REFIID riid, void** ppvObject ) PURE;
+    STDMETHOD_(ULONG,AddRef)( THIS ) PURE;
+    STDMETHOD_(ULONG,Release)( THIS ) PURE;
+    /*** ITextHost methods ***/
+    THISCALLMETHOD_(HDC,TxGetDC)( THIS ) PURE;
+    THISCALLMETHOD_(INT,TxReleaseDC)( THIS_ HDC hdc ) PURE;
+    THISCALLMETHOD_(BOOL,TxShowScrollBar)( THIS_ INT fnBar, BOOL fShow ) PURE;
+    THISCALLMETHOD_(BOOL,TxEnableScrollBar)( THIS_ INT fuSBFlags, INT fuArrowflags ) PURE;
+    THISCALLMETHOD_(BOOL,TxSetScrollRange)( THIS_ INT fnBar, LONG nMinPos, INT nMaxPos, BOOL fRedraw ) PURE;
+    THISCALLMETHOD_(BOOL,TxSetScrollPos)( THIS_ INT fnBar, INT nPos, BOOL fRedraw ) PURE;
+    THISCALLMETHOD_(void,TxInvalidateRect)( THIS_ LPCRECT prc, BOOL fMode ) PURE;
+    THISCALLMETHOD_(void,TxViewChange)( THIS_ BOOL fUpdate ) PURE;
+    THISCALLMETHOD_(BOOL,TxCreateCaret)( THIS_ HBITMAP hbmp, INT xWidth, INT yHeight ) PURE;
+    THISCALLMETHOD_(BOOL,TxShowCaret)( THIS_ BOOL fShow ) PURE;
+    THISCALLMETHOD_(BOOL,TxSetCaretPos)( THIS_ INT x, INT y ) PURE;
+    THISCALLMETHOD_(BOOL,TxSetTimer)( THIS_ UINT idTimer, UINT uTimeout ) PURE;
+    THISCALLMETHOD_(void,TxKillTimer)( THIS_ UINT idTimer ) PURE;
+    THISCALLMETHOD_(void,TxScrollWindowEx)( THIS_ INT dx, INT dy, LPCRECT lprcScroll, LPCRECT lprcClip,
+                                            HRGN hRgnUpdate, LPRECT lprcUpdate, UINT fuScroll ) PURE;
+    THISCALLMETHOD_(void,TxSetCapture)( THIS_ BOOL fCapture ) PURE;
+    THISCALLMETHOD_(void,TxSetFocus)( THIS ) PURE;
+    THISCALLMETHOD_(void,TxSetCursor)( THIS_ HCURSOR hcur, BOOL fText ) PURE;
+    THISCALLMETHOD_(BOOL,TxScreenToClient)( THIS_ LPPOINT lppt ) PURE;
+    THISCALLMETHOD_(BOOL,TxClientToScreen)( THIS_ LPPOINT lppt ) PURE;
+    THISCALLMETHOD_(HRESULT,TxActivate)( THIS_ LONG* plOldState ) PURE;
+    THISCALLMETHOD_(HRESULT,TxDeactivate)( THIS_ LONG lNewState ) PURE;
+    THISCALLMETHOD_(HRESULT,TxGetClientRect)( THIS_ LPRECT prc ) PURE;
+    THISCALLMETHOD_(HRESULT,TxGetViewInset)( THIS_ LPRECT prc ) PURE;
+    THISCALLMETHOD_(HRESULT,TxGetCharFormat)( THIS_ const CHARFORMATW** ppCF ) PURE;
+    THISCALLMETHOD_(HRESULT,TxGetParaFormat)( THIS_ const PARAFORMAT** ppPF ) PURE;
+    THISCALLMETHOD_(COLORREF,TxGetSysColor)( THIS_ int nIndex ) PURE;
+    THISCALLMETHOD_(HRESULT,TxGetBackStyle)( THIS_ TXTBACKSTYLE* pStyle ) PURE;
+    THISCALLMETHOD_(HRESULT,TxGetMaxLength)( THIS_ DWORD* plength ) PURE;
+    THISCALLMETHOD_(HRESULT,TxGetScrollBars)( THIS_ DWORD* pdwScrollBar ) PURE;
+    THISCALLMETHOD_(HRESULT,TxGetPasswordChar)( THIS_ WCHAR* pch ) PURE;
+    THISCALLMETHOD_(HRESULT,TxGetAcceleratorPos)( THIS_ LONG* pch ) PURE;
+    THISCALLMETHOD_(HRESULT,TxGetExtent)( THIS_ LPSIZEL lpExtent ) PURE;
+    THISCALLMETHOD_(HRESULT,OnTxCharFormatChange)( THIS_ const CHARFORMATW* pcf ) PURE;
+    THISCALLMETHOD_(HRESULT,OnTxParaFormatChange)( THIS_ const PARAFORMAT* ppf ) PURE;
+    THISCALLMETHOD_(HRESULT,TxGetPropertyBits)( THIS_ DWORD dwMask, DWORD* pdwBits ) PURE;
+    THISCALLMETHOD_(HRESULT,TxNotify)( THIS_ DWORD iNotify, void* pv ) PURE;
+    THISCALLMETHOD_(HIMC,TxImmGetContext)( THIS ) PURE;
+    THISCALLMETHOD_(void,TxImmReleaseContext)( THIS_ HIMC himc ) PURE;
+    THISCALLMETHOD_(HRESULT,TxGetSelectionBarWidth)( THIS_ LONG* lSelBarWidth ) PURE;
+    /* ITextHost2 methods */
+    THISCALLMETHOD_(BOOL,TxIsDoubleClickPending)( THIS ) PURE;
+    THISCALLMETHOD_(HRESULT,TxGetWindow)( THIS_ HWND *hwnd ) PURE;
+    THISCALLMETHOD_(HRESULT,TxSetForegroundWindow)( THIS ) PURE;
+    THISCALLMETHOD_(HPALETTE,TxGetPalette)( THIS ) PURE;
+    THISCALLMETHOD_(HRESULT,TxGetEastAsianFlags)( THIS_ LONG *flags ) PURE;
+    THISCALLMETHOD_(HCURSOR,TxSetCursor2)( THIS_ HCURSOR cursor, BOOL text ) PURE;
+    THISCALLMETHOD_(void,TxFreeTextServicesNotification)( THIS ) PURE;
+    THISCALLMETHOD_(HRESULT,TxGetEditStyle)( THIS_ DWORD item, DWORD *data ) PURE;
+    THISCALLMETHOD_(HRESULT,TxGetWindowStyles)( THIS_ DWORD *style, DWORD *ex_style ) PURE;
+    THISCALLMETHOD_(HRESULT,TxShowDropCaret)( THIS_ BOOL show, HDC hdc, const RECT *rect ) PURE;
+    THISCALLMETHOD_(HRESULT,TxDestroyCaret)( THIS ) PURE;
+    THISCALLMETHOD_(HRESULT,TxGetHorzExtent)( THIS_ LONG *horz_extent ) PURE;
+};
+#undef INTERFACE
+
+#ifdef COBJMACROS
+/*** IUnknown methods ***/
+#define ITextHost2_QueryInterface(p,a,b) (p)->lpVtbl->QueryInterface(p,a,b)
+#define ITextHost2_AddRef(p) (p)->lpVtbl->AddRef(p)
+#define ITextHost2_Release(p) (p)->lpVtbl->Release(p)
+#endif
+
 HRESULT WINAPI CreateTextServices(IUnknown*,ITextHost*,IUnknown**);
 
 typedef HRESULT (WINAPI *PCreateTextServices)(IUnknown*,ITextHost*,IUnknown**);