TAILIEUCHUNG - Professional Information Technology-Programming Book part 176

Tham khảo tài liệu 'professional information technology-programming book part 176', công nghệ thông tin, kỹ thuật lập trình phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | What is the Registry The Registry is a database used to store settings and options for the 32 bit versions of Microsoft Windows including Windows 95 98 ME and NT 2000. It contains information and settings for all the hardware software users and preferences of the PC. Whenever a user makes changes to a Control Panel settings or File Associations System Policies or installed software the changes are reflected and stored in the Registry. The physical files that make up the registry are stored differently depending on your version of Windows under Windows 95 98 it is contained in two hidden files in your Windows directory called and for Windows Me there is an additional file while under Windows NT 2000 the files are contained seperately in the SystemRoot System32 Config directory. You can not edit these files directly you must use a tool commonly known as a Registry Editor to make any changes using registry editors will be discussed later in the article . The Structure of the Registry The Registry has a hierarchal structure although it looks complicated the structure is similar to the directory structure on your hard disk with Regedit being similar to Windows Explorer. Each main branch denoted by a folder icon in the Registry Editor see left is called a Hive and Hives contains Keys. Each key can contain other keys sometimes referred to as sub-keys as well as Values. The values contain the actual information stored in the Registry. There are three types of values String Binary and DWORD - the use of these depends upon the context. There are six main branches each containing a specific portion of the information stored in the Registry. They are as follows HKEY_CLASSES_ROOT - This branch contains all of your file association mappings to support the drag-and-drop feature OLE information Windows shortcuts and core aspects of the Windows user interface. HKEY_CURRENT_USER - This branch links to the section of HKEY_USERS appropriate for the user

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