Added wxStandardPaths::MSWGetShellDir().

This function allows to get the location of Windows shell special folders not
covered by wxStandardPaths methods (yet), e.g. CSIDL_DESKTOPDIRECTORY.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@61662 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/stdpaths.h

@@ -275,6 +275,26 @@ public:
      */
     void IgnoreAppBuildSubDirs();
 
+    /**
+        Returns location of Windows shell special folder.
+
+        This function is, by definition, MSW-specific. It can be used to access
+        pre-defined shell directories not covered by the existing methods of
+        this class, e.g.:
+        @code
+        #ifdef __WXMSW__
+            // get the location of files waiting to be burned on a CD
+            wxString cdburnArea =
+                wxStandardPaths::MSWGetShellDir(CSIDL_CDBURN_AREA);
+        #endif // __WXMSW__
+        @endcode
+
+        @param csidl
+
+        @since 2.9.1
+     */
+    static wxString MSWGetShellDir(int csidl);
+
     /**
         Lets wxStandardPaths know about the real program installation prefix on a Unix
         system. By default, the value returned by GetInstallPrefix() is used.