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Chapter 21. Configuring Hardware > Secrets of Mastering the Windows 98 Environm...

Secrets of Mastering the Windows 98 Environment: How Hardware Profiles Are Supported in the Registry

When you configure multiple hardware profiles on a Windows 98 system, you are actually making changes to the Registry in the HKEY_CURRENT_CONFIG key. This part, or hive, of the Registry is stored in the System.dat file. The HKEY_CURRENT_CONFIG key includes a pointer to the current system configuration. This information is stored in the collection of configurations located in HKEY_LOCAL_MACHINE \ Config\ 000x, which contains the current hardware configuration of the system. The number x refers to the configuration number. So if you have a docked and an undocked mode for your portable computer, you would have a separate subkey for each configuration: 0001 and 0002.

Under the \Config\000x subkey, you see the system's hardware configuration information. For example, the Display subkey specifies screen fonts and screen settings, such as resolution. The Enum subkey contains subkeys that specify Plug and Play BIOS, and the System subkey contains subkeys that list available printers. You can use this information to verify whether a specific type of device is installed on your system. Chapter 24, "Working with the Windows Registry," takes a closer look at the Registry.


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