Update readme file with instructions for VCExpress and Platform SDK

win/README

@@ -75,3 +75,8 @@ Current issues
 --------------
 1. After changing configuration (eg. adding or removing a storage engine), it
 may be necessary to clean the build tree to remove any stale objects.
+
+2. To use Visual C++ Express Edition you also need to install the Platform SDK.
+Please see this link: http://msdn.microsoft.com/vstudio/express/visualc/usingpsdk/
+At step 4 you only need to add the libraries advapi32.lib and user32.lib to
+the file "corewin_express.vsprops" in order to avoid link errors.