8 ?— 1019).
(Strangely, 64- and 32-bit DWORD values are indistinguishable in the Registry
Editor except in the DWORD editor (Figure 3-5). Presumably, you??™d only
want to use a 64-bit value with a 64-bit application, for which you??™d need the
64-bit edition of Windows Vista.
So, the question that??™s probably on your mind is, ???Huh? How can this knowledge
possibly help me with my love life????
The answer is that it can??™t. In fact, it??™ll probably just make things worse. But
it??™ll be invaluable when you come across a DWORD value that??™s made up of
a bunch of smaller components. For instance, say you flip a switch in some
application and you witness a DWORD value change from 16 to 8. What
you??™ve uncovered is that the aforementioned switch is stored as the fourth bit
(the first being 1, the second being 2, and the third being 4) in this value. (If
you??™re confused, look up ???Binary numeral system??? in Wikipedia for help with
the concept.)
To make things more complicated, there??™s also the BIGENDIAN variant of
the DWORD value (REG_DWORD_BIGENDIAN). This is basically the
same as an ordinary 32-bit DWORD, except that the two 16-bit words are
stored in the opposite order (the larger one coming first).These are rare, but
you might run into trouble if you replace one with an ordinary DWORD
value.
94 | Chapter 3: The Registry
Registry Tasks and Tools
So, that??™s it for Registry basics. The real fun begins with the various Registry
tools you can use, and what you can do with them.
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