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RegLoadKey info  Overview  Group

The RegLoadKey function creates a subkey under HKEY_USER or HKEY_LOCAL_MACHINE and stores registration information from a specified file into that subkey. This registration information is in the form of a hive. A hive is a discrete body of keys, subkeys, and values that is rooted at the top of the registry hierarchy. A hive is backed by a single file and .LOG file.

LONG RegLoadKey(

    HKEY hKey,

// handle of open key

    LPCTSTR lpSubKey,

// address of name of subkey

    LPCTSTR lpFile 

// address of filename for registry information



Specifies the key where the subkey will be created. This can be a predefined reserved handle value, or a handle returned by a call to RegConnectRegistry. The predefined reserved handle values are:


This function always loads information at the top of the registry hierarchy. The HKEY_CLASSES_ROOT and HKEY_CURRENT_USER handle values cannot be specified for this parameter, because they represent subsets of the HKEY_LOCAL_MACHINE and HKEY_USERS handle values, respectively.

Points to a null-terminated string that specifies the name of the key to be created under hKey. This subkey is where the registration information from the file will be loaded.
Points to a null-terminated string containing the name of a file that has registration information. This file must have been created with the RegSaveKey function. Under the file allocation table (FAT) file system, the filename may not have an extension.

Return Values

If the function succeeds, the return value is ERROR_SUCCESS.

If the function fails, the return value is a nonzero error code defined in WINERROR.H. You can use the FormatMessage function with the FORMAT_MESSAGE_FROM_SYSTEM flag to get a generic description of the error.


If hKey is a handle returned by RegConnectRegistry, then the path specified in lpFile is relative to the remote computer.

Windows NT: The calling process must have the SE_RESTORE_NAME privilege. For more information about privileges, see Privileges.

Windows 95: Security privileges are not supported or required.

See Also

RegConnectRegistry, RegDeleteKey, RegReplaceKey, RegRestoreKey, RegSaveKey, RegUnloadKey

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