Add small wxOleInitializer RAII helper.

Wrap wxOleInitialize()/wxOleUninitialize() in a helper class ensuring that we
never forget to call the latter.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77507 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/ole/oleutils.h

@@ -354,4 +354,30 @@ inline void wxOleUninitialize() { }
 
 #endif // wxUSE_OLE/!wxUSE_OLE
 
+// RAII class initializing OLE in its ctor and undoing it in its dtor.
+class wxOleInitializer
+{
+public:
+    wxOleInitializer()
+        : m_ok(wxOleInitialize())
+    {
+    }
+
+    bool IsOk() const
+    {
+        return m_ok;
+    }
+
+    ~wxOleInitializer()
+    {
+        if ( m_ok )
+            wxOleUninitialize();
+    }
+
+private:
+    const bool m_ok;
+
+    wxDECLARE_NO_COPY_CLASS(wxOleInitializer);
+};
+
 #endif  //_WX_OLEUTILS_H