Organization structure of the Registry

As one of the core of the computer, the Registry is always mysterious to common users. This allows users to configure the hardware and software of computer systems according to their own requirements. Program What exactly is it (it is really hard to read this sentence )?
The Registry is used to manage application and file associations, hardware device descriptions, status attributes, and various status information and data.

It has the following features:

1. The registry allows tracking configuration of hardware, system parameters, applications, and device drivers, which makes it possible to modify some settings without restarting.

2. Some of the hardware data logged on to the registry can support the plug-and-play feature of later versions of Windows. When Windows detects a new device on the machine, it stores the data in the Registry. In addition, it can avoid resource conflicts between the new device and the original device.

3. Administrators and Users can check system configurations and settings on the network through the Registry to achieve remote management.

I. organization structure of the Registry

First, enter Regedit in the "run" dialog box to run the Registry Program.
We will see the interface shown in Figure 1.

The registry system is organized by a layer-3 structure and arranged in a layered structure. It consists of [root keys]-[Keys]-[subkeys]-[key values.

Root Key: the system-defined Configuration unit, represented by "hkey.
Hkey_classes_root: defines all registered file extensions, file types, and file icons in the system.

HKEY_CURRENT_USER: defines all permissions of the current user, which is actually part of the content under hkey_user \. defalut, including the login information of the current user.

HKEY_LOCAL_MACHINE: defines all the hardware and software information of the Local Computer (relative to the network environment. When the system configuration and settings change, the following logon items will also change.

Hkey_user: defines all user information, some of which are mapped to the hkey_currnet_usre keyword. Most of its settings can be modified through the control panel.

Hkey_current_config: defines the current configuration of the computer, such as display, printer, and other optional peripherals and their settings. It is actually a pointer to a branch in the HKEY_LOCAL_MACHINE \ config structure.

Note: There are three key values: string value, binary value, and double byte value.