reg entry on Windows 7 64-bit

Why are the values for the registry entries in Windows 7 not registered?

here's an example:
Registry.SetValue (HKEY_LOCAL_MACHINE, "System\\CurrentControlSet\\MultiKey\\Dumps\\00007 50A", "Seed3", "c84a" REG_DWORD);

c84a = 0 >>> Why is the entry 0 ???