Leggete tutto questo post... e poi vediamo se siete
ancora convinti sia il posto migliore... 
The registry is a convenient place to record persistent
cross-process data in a uniform and multi-thread-safe manner.
It
roams with the user
if you store it in HKEY_CURRENT_USER,
and individual keys can be secured (even on systems that use FAT,
which doesn't otherwise support security).
But that doesn't mean that it's free.
The cost of opening a key, reading a value, and
closing it is around 60,000 to 100,000 cycles (I'm told). And that's assuming
the key you're looking for is in the cache. If you open the key and hold it
open, then the act of reading a value costs around 15,000 to 20,000 cycles.
(These numbers are estimates for Windows XP; actual mileage may
vary.)...