The following are the registry functions.
| Function | Description |
|---|
| GetSystemRegistryQuota | Retrieves the current size of the registry and the maximum size that the registry is allowed to attain on the system. |
| RegCloseKey | Closes a handle to the specified registry key. |
| RegConnectRegistry | Establishes a connection to a predefined registry handle on another computer. |
| RegCopyTree | Copies the specified registry key, along with its values and subkeys, to the specified destination key. |
| RegCreateKeyEx | Creates the specified registry key. |
| RegCreateKeyTransacted | Creates the specified registry key and associates it with a transaction. |
| RegDeleteKey | Deletes a subkey and its values. |
| RegDeleteKeyEx | Deletes a subkey and its values from the specified platform-specific view of the registry. |
| RegDeleteKeyTransacted | Deletes a subkey and its values from the specified platform-specific view of the registry as a transacted operation. |
| RegDeleteKeyValue | Removes the specified value from the specified registry key and subkey. |
| RegDeleteTree | Deletes the subkeys and values of the specified key recursively. |
| RegDeleteValue | Removes a named value from the specified registry key. |
| RegDisablePredefinedCache | Disables handle caching for the predefined registry handle for HKEY_CURRENT_USER for the current process. |
| RegDisablePredefinedCacheEx | Disables handle caching for all predefined registry handles for the current process. |
| RegDisableReflectionKey | Disables registry reflection for the specified key. |
| RegEnableReflectionKey | Enables registry reflection for the specified disabled key. |
| RegEnumKeyEx | Enumerates the subkeys of the specified open registry key. |
| RegEnumValue | Enumerates the values for the specified open registry key. |
| RegFlushKey | Writes all attributes of the specified open registry key into the registry. |
| RegGetKeySecurity | Retrieves a copy of the security descriptor protecting the specified open registry key. |
| RegGetValue | Retrieves the type and data for the specified registry value. |
| RegLoadKey | Creates a subkey under HKEY_USERS or HKEY_LOCAL_MACHINE and stores registration information from a specified file into that subkey. |
| RegLoadMUIString | Loads the specified string from the specified key and subkey. |
| RegNotifyChangeKeyValue | Notifies the caller about changes to the attributes or contents of a specified registry key. |
| RegOpenCurrentUser | Retrieves a handle to the HKEY_CURRENT_USER key for the user the current thread is impersonating. |
| RegOpenKeyEx | Opens the specified registry key. |
| RegOpenKeyTransacted | Opens the specified registry key and associates it with a transaction. |
| RegOpenUserClassesRoot | Retrieves a handle to the HKEY_CLASSES_ROOT key for the specified user. |
| RegOverridePredefKey | Maps a predefined registry key to a specified registry key. |
| RegQueryInfoKey | Retrieves information about the specified registry key. |
| RegQueryMultipleValues | Retrieves the type and data for a list of value names associated with an open registry key. |
| RegQueryReflectionKey | Determines whether reflection has been disabled or enabled for the specified key. |
| RegQueryValueEx | Retrieves the type and data for a specified value name associated with an open registry key. |
| RegReplaceKey | Replaces the file backing a registry key and all its subkeys with another file. |
| RegRestoreKey | Reads the registry information in a specified file and copies it over the specified key. |
| RegSaveKey | Saves the specified key and all of its subkeys and values to a new file. |
| RegSaveKeyEx | Saves the specified key and all of its subkeys and values to a new file. You can specify the format for the saved key or hive. |
| RegSetKeyValue | Sets the data for the specified value in the specified registry key and subkey. |
| RegSetKeySecurity | Sets the security of an open registry key. |
| RegSetValueEx | Sets the data and type of a specified value under a registry key. |
| RegUnLoadKey | Unloads the specified registry key and its subkeys from the registry. |
The following are the initialization-file functions. They retrieve information from and copy information to a system- or application-defined initialization file. These functions are provided only for compatibility with 16-bit versions of Windows. New applications should use the registry.
These functions are provided only for compatibility with 16-bit versions of Windows: