Reads key of registry taking in account a 64 bit Windows
Note: For reading some keys from the registry administrator rights could
be needed
| Miscellaneous.au3 _RegistryRead |
| $sKey | Registry key |
| $sValueName | Value name to read |
| value | Read key value |
_RegistryRead( "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\", "CurrentVersion" )