About the Registry

The Windows Registry is essentially a central hierarchical database that is used by the operating system and by application software. The Registry first appeared in Windows 95 and replaces the old INI files that stored Windows and application settings.

CROSS- Your VBA macros can also read and write information to the Registry. Refer to

REFERENCE Chapter 11 for details.

You can use the Registry Editor program to browse the Registry - and even edit its contents if you know what you're doing. The Registry Editor is named regedit.exe. Before beginning your explorations, take a minute to read the upcoming sidebar (titled "Before You Edit the Registry ..."). Figure 4-9 shows what the Registry Editor looks like.

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Figure 4-9: The Registry Editor lets you browse and make changes to the Registry. The Registry consists of keys and values, arranged in a hierarchy. The top-level keys are:

■ HKEY_CLASSES_ROOT

■ HKEY_CURRENT_USER

■ HKEY_LOCAL_MACHINE

■ HKEY_CURRENT_CONFIG

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