The Khronos registry contains specifications, header files, extension specifications, enumerant and function registries, and other related documentation for Khronos APIs, Languages, and related products.
Contents
What are the five registry keys? In most versions of Windows, the following keys are in the registry: HKEY_CLASSES_ROOT (HKCR), HKEY_CURRENT_USER (HKCU), HKEY_LOCAL_MACHINE (HKLM), HKEY_USERS (HKU), and HKEY_CURRENT_CONFIG.
The registry is a hierarchical database that contains data that is critical for the operation of Windows and the applications and services that run on Windows. The data is structured in a tree format. Each node in the tree is called a key. Each key can contain both subkeys and data entries called values.
This key is sometimes abbreviated as HKCU. Contains all the actively loaded user profiles on the computer. HKEY_CURRENT_USER is a subkey of HKEY_USERS.
Components of Windows Registry
Windows Registry consists of three main components – the Root level keys, Keys, and Values.
Registry Hives – HKCR, HKCU, HKLM, HKU, HKCC, and HKPD.
This identifies the start of a new registry path. Each key or subkey is a new registry path. If you have several keys in your . reg file, blank lines can help you to examine and to troubleshoot the contents.
You can use Get-ChildItem to view registry keys and Set-Location to navigate to a key path. Registry values are attributes of a registry key. In the Registry drive, they are called Item Properties. A registry key can have both children keys and item properties.
DWORD (32-bit) Values & QWORD (64-bit) Values
This means that you can have both types of registry values on both 32-bit and 64-bit operating systems. In this context, a “word” means 16 bits. DWORD, then, means “double-word,” or 32 bits (16 X 2). Following this logic, QWORD means “quad-word,” or 64 bits (16 X 4).
HKEY_CURRENT_USER, often abbreviated as HKCU, is one of a half-dozen or so registry hives, a major part of the Windows Registry. It contains configuration information for Windows and software specific to the currently logged-in user.
HKLM is machine settings (for all users), HKCU is per user. VS does mirror HKLM settings into an HKCU configuration key and redirect registry reads at run-time from HKLM -> HKCU to allow it to run even without admin privileges.
HKEY_CURRENT_CONFIG, sometimes shortened to HKCC, is a registry hive that’s a part of the Windows Registry. It doesn’t store any information itself but instead acts as a pointer, or a shortcut, to a registry key that keeps the information about the hardware profile currently being used.
There are two types of the registry in the record keeping which are centralized and decentralized registries.
Windows Registry root Keys HKEY_CLASSES_ROOTIt is a registry hive in the Windows Registry and contains file extension association information, as well as programmatic identifier (ProgID), Class ID (CLSID), and Interface ID (IID) data.
To view the contents of a REG file, right-click it in File Explorer and select “Edit.” This will open it in Notepad. Note: If you don’t see the “Edit” option, the REG file may be inside a ZIP archive. You may need to extract the REG file from the ZIP archive before continuing.
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