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[wxWidgets.git] / include / wx / msw / uxtheme.h
diff --git a/include/wx/msw/uxtheme.h b/include/wx/msw/uxtheme.h
index 6de85262a9cd076b2f3b2fbaf36b6d975a35fb3f..c21cd3912de3edb77baaccb4bce5927a5578b117 100644 (file)
--- a/include/wx/msw/uxtheme.h
+++ b/include/wx/msw/uxtheme.h
@@ -1,253 +1,73 @@
 ///////////////////////////////////////////////////////////////////////////////
 // Name:        include/wx/msw/uxtheme.h
 // Purpose:     wxUxThemeEngine class: support for XP themes
 ///////////////////////////////////////////////////////////////////////////////
 // Name:        include/wx/msw/uxtheme.h
 // Purpose:     wxUxThemeEngine class: support for XP themes
-// Author:      
+// Author:      John Platts, Vadim Zeitlin
 // Modified by:
 // Created:     2003
 // RCS-ID:      $Id$
 // Modified by:
 // Created:     2003
 // RCS-ID:      $Id$
-// Copyright:   (c) 2003 wxWindows Dev-Team
-// License:     wxWindows license
+// Copyright:   (c) 2003 John Platts, Vadim Zeitlin
+// License:     wxWindows licence
 ///////////////////////////////////////////////////////////////////////////////
 
 #ifndef _WX_UXTHEME_H_
 #define _WX_UXTHEME_H_
 
 ///////////////////////////////////////////////////////////////////////////////
 
 #ifndef _WX_UXTHEME_H_
 #define _WX_UXTHEME_H_
 
-#ifdef __GNUG__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
   #pragma interface "uxtheme.h"
 #endif
 
 #include "wx/defs.h"
 
   #pragma interface "uxtheme.h"
 #endif
 
 #include "wx/defs.h"
 
-#if wxUSE_UNICODE
-typedef struct _WXUOSVERSIONINFOEXW {
-    WXDWORD        dwOSVersionInfoSize;
-    WXDWORD        dwMajorVersion;
-    WXDWORD        dwMinorVersion;
-    WXDWORD        dwBuildNumber;
-    WXDWORD        dwPlatformId;
-    wchar_t        szCSDVersion[ 128 ];     // Maintenance string for PSS usage
-    unsigned short wServicePackMajor;
-    unsigned short wServicePackMinor;
-    unsigned short wSuiteMask;
-    unsigned char  wProductType;
-    unsigned char  wReserved;
-} WXUOSVERSIONINFOEXW, *PWXUOSVERSIONINFOEXW, *LPWXUOSVERSIONINFOEXW;
-#define WXUOSVERSIONINFOEX WXUOSVERSIONINFOEXW
-#define PWXUOSVERSIONINFOEX PWXUOSVERSIONINFOEXW
-#define LPWXUOSVERSIONINFOEX LPWXUOSVERSIONINFOEXW
-#else
-typedef struct _WXUOSVERSIONINFOEXA {
-    WXDWORD        dwOSVersionInfoSize;
-    WXDWORD        dwMajorVersion;
-    WXDWORD        dwMinorVersion;
-    WXDWORD        dwBuildNumber;
-    WXDWORD        dwPlatformId;
-    char           szCSDVersion [128];     // Maintenance string for PSS usage
-    unsigned short wServicePackMajor;
-    unsigned short wServicePackMinor;
-    unsigned short wSuiteMask;
-    unsigned char  wProductType;
-    unsigned char  wReserved;
-} WXUOSVERSIONINFOEXA, *PWXUOSVERSIONINFOEXA, *LPWXUOSVERSIONINFOEXA;
-#define WXUOSVERSIONINFOEX WXUOSVERSIONINFOEXA
-#define PWXUOSVERSIONINFOEX PWXUOSVERSIONINFOEXA
-#define LPWXUOSVERSIONINFOEX LPWXUOSVERSIONINFOEXA
-#endif
-
-typedef int WXUBOOL;
-
-typedef struct tagWXURECT
-{
-    long    left;
-    long    top;
-    long    right;
-    long    bottom;
-} WXURECT;
-
-typedef void* WXHTHEME;
-typedef long WXUHRESULT;
-typedef WXHTHEME (__stdcall *PFNWXUOPENTHEMEDATA)(WXHWND, const wchar_t *); 
-typedef WXUHRESULT (__stdcall *PFNWXUCLOSETHEMEDATA)(WXHTHEME);
-typedef WXUHRESULT (__stdcall *PFNWXUDRAWTHEMEBACKGROUND)(WXHTHEME, WXHDC, 
-    int, int, const WXURECT *, const WXURECT *);
-#define WXU_DTT_GRAYED 0x1
-typedef WXUHRESULT (__stdcall *PFNWXUDRAWTHEMETEXT)(WXHTHEME, WXHDC, int, 
-    int, const wchar_t *, int, DWORD, 
-    DWORD, const WXURECT *);
-typedef WXUHRESULT (__stdcall *PFNWXUGETTHEMEBACKGROUNDCONTENTRECT)(WXHTHEME, WXHDC, 
-    int, int, const WXURECT *, WXURECT *);
-typedef WXUHRESULT (__stdcall *PFNWXUGETTHEMEBACKGROUNDEXTENT)(WXHTHEME, WXHDC, int, int, 
-    const WXURECT *, WXURECT *);
-
-enum WXUTHEMESIZE
-{
-    WXU_TS_MIN,             // minimum size
-    WXU_TS_TRUE,            // size without stretching
-    WXU_TS_DRAW             // size that theme mgr will use to draw part
-};
-
-typedef struct tagWXUSIZE
-{
-    long        cx;
-    long        cy;
-} WXUSIZE;
-
-typedef struct tagWXUTEXTMETRIC
-{
-    long          tmHeight;
-    long          tmAscent;
-    long          tmDescent;
-    long          tmInternalLeading;
-    long          tmExternalLeading;
-    long          tmAveCharWidth;
-    long          tmMaxCharWidth;
-    long          tmWeight;
-    long          tmOverhang;
-    long          tmDigitizedAspectX;
-    long          tmDigitizedAspectY;
-    wchar_t       tmFirstChar;
-    wchar_t       tmLastChar;
-    wchar_t       tmDefaultChar;
-    wchar_t       tmBreakChar;
-    unsigned char tmItalic;
-    unsigned char tmUnderlined;
-    unsigned char tmStruckOut;
-    unsigned char tmPitchAndFamily;
-    unsigned char tmCharSet;
-} WXUTEXTMETRIC;
-
-typedef WXUHRESULT (__stdcall *PFNWXUGETTHEMEPARTSIZE)(WXHTHEME, WXHDC, int, int, const WXURECT *, 
-    enum WXUTHEMESIZE, WXUSIZE *);
-typedef WXUHRESULT (__stdcall *PFNWXUGETTHEMETEXTEXTENT)(WXHTHEME, WXHDC, int, int, const wchar_t *, 
-    int, WXDWORD, const WXURECT *, WXURECT *);
-typedef WXUHRESULT (__stdcall *PFNWXUGETTHEMETEXTMETRICS)(WXHTHEME, WXHDC,
-    int, int, WXUTEXTMETRIC*);
-typedef WXUHRESULT (__stdcall *PFNWXUGETTHEMEBACKGROUNDREGION)(WXHTHEME, WXHDC,
-    int, int, const WXURECT *, WXHRGN *);
-
-#define WXU_HTTB_BACKGROUNDSEG          0x0000
-#define WXU_HTTB_FIXEDBORDER            0x0002
-#define WXU_HTTB_CAPTION                0x0004
-#define WXU_HTTB_RESIZINGBORDER_LEFT    0x0010
-#define WXU_HTTB_RESIZINGBORDER_TOP     0x0020
-#define WXU_HTTB_RESIZINGBORDER_RIGHT   0x0040
-#define WXU_HTTB_RESIZINGBORDER_BOTTOM  0x0080
-#define WXU_HTTB_RESIZINGBORDER         0x00F0
-#define WXU_HTTB_SIZINGTEMPLATE         0x0100
-#define WXU_HTTB_SYSTEMSIZINGMARGINS    0x0200
-
-typedef struct tagWXUPOINT
-{
-    long x;
-    long y;
-} WXUPOINT;
-
-typedef WXUHRESULT (__stdcall *PFNWXUHITTESTTHEMEBACKGROUND)(WXHTHEME, WXHDC, int,
-    int, WXDWORD, const WXURECT *, WXHRGN,
-    WXUPOINT, unsigned short *);
-typedef WXUHRESULT (__stdcall *PFNWXUDRAWTHEMEEDGE)(WXHTHEME, WXHDC, int, int,
-    const WXURECT *, unsigned int, unsigned int, WXURECT *);
-typedef WXUHRESULT (__stdcall *PFNWXUDRAWTHEMEICON)(WXHTHEME, WXHDC, int, int,
-    const WXURECT *, WXHIMAGELIST, int);
-typedef WXUBOOL (__stdcall *PFNWXUISTHEMEPARTDEFINED)(WXHTHEME, int, int);
-typedef WXUBOOL (__stdcall *PFNWXUISTHEMEBACKGROUNDPARTIALLYTRANSPARENT)(WXHTHEME, int, int);
-typedef WXUHRESULT (__stdcall *PFNWXUGETTHEMECOLOR)(WXHTHEME, int, int, int, WXCOLORREF*);
-typedef WXUHRESULT (__stdcall *PFNWXUGETTHEMEMETRIC)(WXHTHEME, WXHDC, int,
-    int, int, int *);
-typedef WXUHRESULT (__stdcall *PFNWXUGETTHEMESTRING)(WXHTHEME, int,
-    int, int, wchar_t *, int);
-typedef WXUHRESULT (__stdcall *PFNWXUGETTHEMEBOOL)(WXHTHEME, int, int, int, WXUBOOL *);
-typedef WXUHRESULT (__stdcall *PFNWXUGETTHEMEINT)(WXHTHEME, int, int, int, int *);
-typedef WXUHRESULT (__stdcall *PFNWXUGETTHEMEENUMVALUE)(WXHTHEME, int, int, int, int *);
-typedef WXUHRESULT (__stdcall *PFNWXUGETTHEMEPOSITION)(WXHTHEME, int, int, int, WXUPOINT *);
-typedef struct tagWXULOGFONT
-{
-    long          lfHeight;
-    long          lfWidth;
-    long          lfEscapement;
-    long          lfOrientation;
-    long          lfWeight;
-    unsigned char lfItalic;
-    unsigned char lfUnderline;
-    unsigned char lfStrikeOut;
-    unsigned char lfCharSet;
-    unsigned char lfOutPrecision;
-    unsigned char lfClipPrecision;
-    unsigned char lfQuality;
-    unsigned char lfPitchAndFamily;
-    wchar_t       lfFaceName[32];
-} WXULOGFONT;
-typedef WXUHRESULT (__stdcall *PFNWXUGETTHEMEFONT)(WXHTHEME, WXHDC, int, int, int, WXULOGFONT *);
-typedef WXUHRESULT (__stdcall *PFNWXUGETTHEMERECT)(WXHTHEME, int, int, int, WXURECT *);
-typedef struct _WXUMARGINS
-{
-    int cxLeftWidth;      // width of left border that retains its size
-    int cxRightWidth;     // width of right border that retains its size
-    int cyTopHeight;      // height of top border that retains its size
-    int cyBottomHeight;   // height of bottom border that retains its size
-} WXUMARGINS, *PWXUMARGINS;
-typedef WXUHRESULT (__stdcall *PFNWXUGETTHEMEMARGINS)(WXHTHEME, WXHDC, int,
-    int, int, WXURECT *, WXUMARGINS *);
-
-#define WXU_MAX_INTLIST_COUNT 10
-typedef struct _WXUINTLIST
-{
-    int iValueCount;      // number of values in iValues
-    int iValues[WXU_MAX_INTLIST_COUNT];
-} WXUINTLIST, *PWXUINTLIST;
-typedef WXUHRESULT (__stdcall *PFNWXUGETTHEMEINTLIST)(WXHTHEME, int,
-       int, int, WXUINTLIST*);
-
-enum WXUPROPERTYORIGIN
-{
-    WXU_PO_STATE,           // property was found in the state section
-    WXU_PO_PART,            // property was found in the part section
-    WXU_PO_CLASS,           // property was found in the class section
-    WXU_PO_GLOBAL,          // property was found in [globals] section
-    WXU_PO_NOTFOUND         // property was not found
-};
-
-typedef WXUHRESULT (__stdcall *PFNWXUGETTHEMEPROPERTYORIGIN)(WXHTHEME, int,
-    int, int, enum WXUPROPERTYORIGIN *);
-typedef WXUHRESULT (__stdcall *PFNWXUSETWINDOWTHEME)(WXHWND, const wchar_t*, const wchar_t *);
-typedef WXUHRESULT (__stdcall *PFNWXUGETTHEMEFILENAME)(WXHTHEME, int, int, int, wchar_t *, int);
-typedef WXCOLORREF (__stdcall *PFNWXUGETTHEMESYSCOLOR)(WXHTHEME, int);
-typedef WXHBRUSH (__stdcall *PFNWXUGETTHEMESYSCOLORBRUSH)(WXHTHEME, int);
-typedef WXUBOOL (__stdcall *PFNWXUGETTHEMESYSBOOL)(WXHTHEME, int);
-typedef int (__stdcall *PFNWXUGETTHEMESYSSIZE)(WXHTHEME, int);
-typedef WXUHRESULT (__stdcall *PFNWXUGETTHEMESYSFONT)(WXHTHEME, int, WXULOGFONT *);
-typedef WXUHRESULT (__stdcall *PFNWXUGETTHEMESYSSTRING)(WXHTHEME, int, wchar_t *, int);
-typedef WXUHRESULT (__stdcall *PFNWXUGETTHEMESYSINT)(WXHTHEME, int, int *);
-typedef WXUBOOL (__stdcall *PFNWXUISTHEMEACTIVE)();
-typedef WXUBOOL (__stdcall *PFNWXUISAPPTHEMED)();
-typedef WXHTHEME (__stdcall *PFNWXUGETWINDOWTHEME)(WXHWND);
-
-#define WXU_ETDT_DISABLE        0x00000001
-#define WXU_ETDT_ENABLE         0x00000002
-#define WXU_ETDT_USETABTEXTURE  0x00000004
-#define WXU_ETDT_ENABLETAB      0x00000006
-
-typedef WXUHRESULT (__stdcall *PFNWXUENABLETHEMEDIALOGTEXTURE)(WXHWND, WXDWORD);
-typedef WXUBOOL (__stdcall *PFNWXUISTHEMEDIALOGTEXTUREENABLED)(WXHWND);
-
-#define WXU_STAP_ALLOW_NONCLIENT    1
-#define WXU_STAP_ALLOW_CONTROLS     2
-#define WXU_STAP_ALLOW_WEBCONTENT   4
-
-typedef WXDWORD (__stdcall *PFNWXUGETTHEMEAPPPROPERTIES)();
-typedef void (__stdcall *PFNWXUSETTHEMEAPPPROPERTIES)(WXDWORD);
-typedef WXUHRESULT (__stdcall *PFNWXUGETCURRENTTHEMENAME)(wchar_t *, int, 
-    wchar_t *, int, wchar_t *, int);
-
-#define WXU_SZ_THDOCPROP_DISPLAYNAME                L"DisplayName"
-#define WXU_SZ_THDOCPROP_CANONICALNAME              L"ThemeName"
-#define WXU_SZ_THDOCPROP_TOOLTIP                    L"ToolTip"
-#define WXU_SZ_THDOCPROP_AUTHOR                     L"author"
-
-typedef WXUHRESULT (__stdcall *PFNWXUGETTHEMEDOCUMENTATIONPROPERTY)(const wchar_t *,
-    const wchar_t *, wchar_t *, int);
-typedef WXUHRESULT (__stdcall *PFNWXUDRAWTHEMEPARENTBACKGROUND)(WXHWND, WXHDC, WXURECT *);
-typedef WXUHRESULT (__stdcall *PFNWXUENABLETHEMING)(WXUBOOL);
+#include "wx/msw/wrapwin.h"
+#include "wx/msw/uxthemep.h"
+
+typedef HTHEME  (__stdcall *PFNWXUOPENTHEMEDATA)(HWND, const wchar_t *);
+typedef HRESULT (__stdcall *PFNWXUCLOSETHEMEDATA)(HTHEME);
+typedef HRESULT (__stdcall *PFNWXUDRAWTHEMEBACKGROUND)(HTHEME, HDC, int, int, const RECT *, const RECT *);
+typedef HRESULT (__stdcall *PFNWXUDRAWTHEMETEXT)(HTHEME, HDC, int, int, const wchar_t *, int, DWORD, DWORD, const RECT *);
+typedef HRESULT (__stdcall *PFNWXUGETTHEMEBACKGROUNDCONTENTRECT)(HTHEME, HDC, int, int, const RECT *, RECT *);
+typedef HRESULT (__stdcall *PFNWXUGETTHEMEBACKGROUNDEXTENT)(HTHEME, HDC, int, int, const RECT *, RECT *);
+typedef HRESULT (__stdcall *PFNWXUGETTHEMEPARTSIZE)(HTHEME, HDC, int, int, const RECT *, /* enum */ THEMESIZE, SIZE *);
+typedef HRESULT (__stdcall *PFNWXUGETTHEMETEXTEXTENT)(HTHEME, HDC, int, int, const wchar_t *, int, DWORD, const RECT *, RECT *);
+typedef HRESULT (__stdcall *PFNWXUGETTHEMETEXTMETRICS)(HTHEME, HDC, int, int, TEXTMETRIC*);
+typedef HRESULT (__stdcall *PFNWXUGETTHEMEBACKGROUNDREGION)(HTHEME, HDC, int, int, const RECT *, HRGN *);
+typedef HRESULT (__stdcall *PFNWXUHITTESTTHEMEBACKGROUND)(HTHEME, HDC, int, int, DWORD, const RECT *, HRGN, POINT, unsigned short *);
+typedef HRESULT (__stdcall *PFNWXUDRAWTHEMEEDGE)(HTHEME, HDC, int, int, const RECT *, unsigned int, unsigned int, RECT *);
+typedef HRESULT (__stdcall *PFNWXUDRAWTHEMEICON)(HTHEME, HDC, int, int, const RECT *, HIMAGELIST, int);
+typedef BOOL    (__stdcall *PFNWXUISTHEMEPARTDEFINED)(HTHEME, int, int);
+typedef BOOL    (__stdcall *PFNWXUISTHEMEBACKGROUNDPARTIALLYTRANSPARENT)(HTHEME, int, int);
+typedef HRESULT (__stdcall *PFNWXUGETTHEMECOLOR)(HTHEME, int, int, int, COLORREF*);
+typedef HRESULT (__stdcall *PFNWXUGETTHEMEMETRIC)(HTHEME, HDC, int, int, int, int *);
+typedef HRESULT (__stdcall *PFNWXUGETTHEMESTRING)(HTHEME, int, int, int, wchar_t *, int);
+typedef HRESULT (__stdcall *PFNWXUGETTHEMEBOOL)(HTHEME, int, int, int, BOOL *);
+typedef HRESULT (__stdcall *PFNWXUGETTHEMEINT)(HTHEME, int, int, int, int *);
+typedef HRESULT (__stdcall *PFNWXUGETTHEMEENUMVALUE)(HTHEME, int, int, int, int *);
+typedef HRESULT (__stdcall *PFNWXUGETTHEMEPOSITION)(HTHEME, int, int, int, POINT *);
+typedef HRESULT (__stdcall *PFNWXUGETTHEMEFONT)(HTHEME, HDC, int, int, int, LOGFONT *);
+typedef HRESULT (__stdcall *PFNWXUGETTHEMERECT)(HTHEME, int, int, int, RECT *);
+typedef HRESULT (__stdcall *PFNWXUGETTHEMEMARGINS)(HTHEME, HDC, int, int, int, RECT *, MARGINS *);
+typedef HRESULT (__stdcall *PFNWXUGETTHEMEINTLIST)(HTHEME, int, int, int, INTLIST*);
+typedef HRESULT (__stdcall *PFNWXUGETTHEMEPROPERTYORIGIN)(HTHEME, int, int, int, /* enum */ PROPERTYORIGIN *);
+typedef HRESULT (__stdcall *PFNWXUSETWINDOWTHEME)(HWND, const wchar_t*, const wchar_t *);
+typedef HRESULT (__stdcall *PFNWXUGETTHEMEFILENAME)(HTHEME, int, int, int, wchar_t *, int);
+typedef COLORREF(__stdcall *PFNWXUGETTHEMESYSCOLOR)(HTHEME, int);
+typedef HBRUSH  (__stdcall *PFNWXUGETTHEMESYSCOLORBRUSH)(HTHEME, int);
+typedef BOOL    (__stdcall *PFNWXUGETTHEMESYSBOOL)(HTHEME, int);
+typedef int     (__stdcall *PFNWXUGETTHEMESYSSIZE)(HTHEME, int);
+typedef HRESULT (__stdcall *PFNWXUGETTHEMESYSFONT)(HTHEME, int, LOGFONT *);
+typedef HRESULT (__stdcall *PFNWXUGETTHEMESYSSTRING)(HTHEME, int, wchar_t *, int);
+typedef HRESULT (__stdcall *PFNWXUGETTHEMESYSINT)(HTHEME, int, int *);
+typedef BOOL    (__stdcall *PFNWXUISTHEMEACTIVE)();
+typedef BOOL    (__stdcall *PFNWXUISAPPTHEMED)();
+typedef HTHEME  (__stdcall *PFNWXUGETWINDOWTHEME)(HWND);
+typedef HRESULT (__stdcall *PFNWXUENABLETHEMEDIALOGTEXTURE)(HWND, DWORD);
+typedef BOOL    (__stdcall *PFNWXUISTHEMEDIALOGTEXTUREENABLED)(HWND);
+typedef DWORD   (__stdcall *PFNWXUGETTHEMEAPPPROPERTIES)();
+typedef void    (__stdcall *PFNWXUSETTHEMEAPPPROPERTIES)(DWORD);
+typedef HRESULT (__stdcall *PFNWXUGETCURRENTTHEMENAME)(wchar_t *, int, wchar_t *, int, wchar_t *, int);
+typedef HRESULT (__stdcall *PFNWXUGETTHEMEDOCUMENTATIONPROPERTY)(const wchar_t *, const wchar_t *, wchar_t *, int);
+typedef HRESULT (__stdcall *PFNWXUDRAWTHEMEPARENTBACKGROUND)(HWND, HDC, RECT *);
+typedef HRESULT (__stdcall *PFNWXUENABLETHEMING)(BOOL);
 
 // ----------------------------------------------------------------------------
 // wxUxThemeEngine: provides all theme functions from uxtheme.dll
 
 // ----------------------------------------------------------------------------
 // wxUxThemeEngine: provides all theme functions from uxtheme.dll
@@ -269,6 +89,10 @@ public:
     // get the theme engine or NULL if themes are not available
     static wxUxThemeEngine *Get();
 
     // get the theme engine or NULL if themes are not available
     static wxUxThemeEngine *Get();
 
+    // get the theme enging or NULL if themes are not available or not used for
+    // this application
+    static wxUxThemeEngine *GetIfActive();
+
     // all uxtheme.dll functions
     wxUX_THEME_DECLARE(PFNWXUOPENTHEMEDATA, OpenThemeData)
     wxUX_THEME_DECLARE(PFNWXUCLOSETHEMEDATA, CloseThemeData)
     // all uxtheme.dll functions
     wxUX_THEME_DECLARE(PFNWXUOPENTHEMEDATA, OpenThemeData)
     wxUX_THEME_DECLARE(PFNWXUCLOSETHEMEDATA, CloseThemeData)
@@ -337,7 +161,7 @@ private:
     // uxtheme.dll
     wxDynamicLibrary m_dllUxTheme;
 
     // uxtheme.dll
     wxDynamicLibrary m_dllUxTheme;
 
-    
+
     // the one and only theme engine, initially NULL
     static wxUxThemeEngine *ms_themeEngine;
 
     // the one and only theme engine, initially NULL
     static wxUxThemeEngine *ms_themeEngine;
 
@@ -348,17 +172,64 @@ private:
     friend class wxUxThemeModule;
 #endif // wxUSE_UXTHEME
 
     friend class wxUxThemeModule;
 #endif // wxUSE_UXTHEME
 
-    DECLARE_NO_COPY_CLASS(wxUxThemeEngine);
+    DECLARE_NO_COPY_CLASS(wxUxThemeEngine)
 };
 
 };
 
-#if !wxUSE_UXTHEME
+#if wxUSE_UXTHEME
+
+/* static */ inline wxUxThemeEngine *wxUxThemeEngine::GetIfActive()
+{
+    wxUxThemeEngine *engine = Get();
+    return engine && engine->IsAppThemed() && engine->IsThemeActive()
+                ? engine
+                : NULL;
+}
+
+#else // !wxUSE_UXTHEME
 
 /* static */ inline wxUxThemeEngine *wxUxThemeEngine::Get()
 {
     return NULL;
 }
 
 
 /* static */ inline wxUxThemeEngine *wxUxThemeEngine::Get()
 {
     return NULL;
 }
 
-#endif // !wxUSE_UXTHEME
+/* static */ inline wxUxThemeEngine *wxUxThemeEngine::GetIfActive()
+{
+    return NULL;
+}
+
+#endif // wxUSE_UXTHEME/!wxUSE_UXTHEME
+
+// ----------------------------------------------------------------------------
+// wxUxThemeHandle: encapsulates ::Open/CloseThemeData()
+// ----------------------------------------------------------------------------
+
+class wxUxThemeHandle
+{
+public:
+    wxUxThemeHandle(wxWindow *win, const wchar_t *classes)
+    {
+        wxUxThemeEngine *engine = wxUxThemeEngine::Get();
+
+        m_hTheme =
+            engine ? (HTHEME)engine->OpenThemeData((HWND) win->GetHWND(), classes)
+                   : NULL;
+    }
+
+    operator HTHEME() const { return m_hTheme; }
+
+    ~wxUxThemeHandle()
+    {
+        if ( m_hTheme )
+        {
+            wxUxThemeEngine::Get()->CloseThemeData(m_hTheme);
+        }
+    }
+
+private:
+    HTHEME m_hTheme;
+
+    DECLARE_NO_COPY_CLASS(wxUxThemeHandle)
+};
 
 #endif // _WX_UXTHEME_H_
 
 
 #endif // _WX_UXTHEME_H_
 
wxWidgets (Impactor)