wxRegConfig now works correctly again

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@692 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/regconf.h

@@ -29,8 +29,8 @@ class wxRegConfig : public wxConfigBase
 public:
   // ctor & dtor
     // will store data in HKLM\appName and HKCU\appName
-  wxRegConfig(const wxString& appName = wxEmptyString, const wxString& vendorName = wxEmptyString,
+  wxRegConfig(const wxString& appName = "", const wxString& vendorName = "",
-    const wxString& localFilename = wxEmptyString, const wxString& globalFilename = wxEmptyString,
+              const wxString& localFilename = "", const wxString& globalFilename = "",
               long style = 0);
 
     // dtor will save unsaved data

include/wx/msw/registry.h

@@ -210,5 +210,33 @@ private:
   MUTABLE long m_dwLastError;   // last error (0 if none)
 };
 
+// ----------------------------------------------------------------------------
+// high level functions working with the registry
+// ----------------------------------------------------------------------------
+
+// file extensions and MIME types
+// ------------------------------
+
+// Look for and return the extension (with leading '.') which corresponds to
+// MIME type strMimeType in pExt.
+//
+// Return value: true if MIME type was found, false otherwise
+bool GetExtensionFromMimeType(wxString *pExt, const wxString& strMimeType);
+
+// Look for MIME type of the given extension, return TRUE if found.
+bool GetMimeTypeFromExtension(wxString *pMimeType, const wxString& strExt);
+
+// Get file type from extension (it's not the same thing: for example, for
+// the extension .txt the default file type is txtfile), return FALSE if not
+// found.
+bool GetFileTypeFromExtension(wxString *pFileType, const wxString& strExt);
+
+// Get the default icon from file type
+class wxIcon;
+bool GetFileTypeIcon(wxIcon *pIcon, const wxString& strFileType);
+
+// Get the description of files of this type
+bool GetFileTypeDescription(wxString *pDesc, const wxString& strFileType);
+
 #endif  //_REGISTRY_H