Managing the Registry The data types defined include (Web hosting rating)
Managing the Registry The data types defined include the following: . REG_BINARY Raw binary data without any formatting or parsing. You can view binary data in several forms, including standard binary and hexadecimal. In some cases, if you view the binary data, you will see the hexadecimal values as well as the text characters these values define. . REG_DWORD A binary data type in which 4-byte integer values are stored. REG_DWORD is often used to track values that can be incremented, status codes, or Boolean flags. With Boolean flags, a value of 0 means the flag is off (false) and a value of 1 means the flag is on (true). . REG_SZ A fixed-length string of Unicode characters. REG_SZ is used to store values that are meant to be read by users and can include names, descriptions, and so on, as well as stored file system paths. . REG_EXPAND_SZ A variable-length string that can include environment variables that are to be expanded when the data is read by the operating system, its components, or services, as well as installed applications. Environment variables are enclosed in percentage signs (%) to set them off from other values in the string. For example, %SystemDrive% refers to the SystemDrive environment variable. A REG_EXPAND_SZ value that defines a path to use could include this environment variable, such as %SystemDrive%Program FilesCommon Files. . REG_MULTI_SZ A multiple-parameter string that can be used to store multiple string values in a single entry. Each value is separated by a standard delimiter so that the individual values can be picked out as necessary. . REG_FULL_RESOURCE_DESCRIPTOR A value with an encoded resource descriptor, such as a list of resources used by a device driver or a hardware component. REG_FULL_RESOURCE_DESCRIPTOR values are associated with hardware components, such as a system s central processors, floating-point processors, or multifunction adapters. The most common data types you ll see in the Registry are REG_SZ and REG_DWORD. The vast majority of value entries has this data type. The most important thing to know about these data types is that one is used with strings of characters and the other is used with binary data that is normally represented in hexadecimal format. And don t worry, if you have to create a value entry typically because you are directed to by a Microsoft Knowledge Base article in an attempt to resolve an issue you ll usually be told which data type to use. Again, more often than not, this data type is either REG_SZ or REG_DWORD. Managing the Registry Windows Server 2003 provides several tools for working with the Registry. The main tool, of course, is Registry Editor, which is started by typing regedit or regedt32 at the command line or in the Run dialog box. Another tool for working with the Registry is the REG command. Chapter 14 Part 4: Managing Windows Server 2003 Systems
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