The valueName property is the name of the value to retrieve within the specified key. Using the "regedit" utility that comes with Windows, these values are shown on the right-hand side after you have chosen a key. For example "CommonFilesDir" is a value within the "SOFTWARE\Microsoft\Windows\CurrentVersion" key in the HKEY_LOCAL_MACHINE hive. To use the "Default" value within a key, leave the valueName property blank.
This value does not have to be a string type. This bean converts several value types into strings at runtime. NOTE: This property is resolved prior to retrieving the value from the registry.