The RegEnumKey function enumerates subkeys of the specified open registry key. The function retrieves the name of one subkey each time it is called. This function is provided for compatibility with Windows version 3.1. Win32-based applications should use the RegEnumKeyEx function.
LONG RegEnumKey(
HKEY hKey, |
// handle of key to query |
DWORD dwIndex, |
// index of subkey to query |
LPTSTR lpName, |
// address of buffer for subkey name |
DWORD cbName |
// size of subkey buffer |
); |
HKEY_CLASSES_ROOT
HKEY_CURRENT_CONFIG
HKEY_CURRENT_USER
HKEY_LOCAL_MACHINE
HKEY_USERS
Windows NT only: HKEY_PERFORMANCE_DATA
Windows 95 only: HKEY_DYN_DATA
The keys returned are relative to the key identified by hKey.
Because subkeys are not ordered, any new subkey will have an arbitrary index.
This means that the function may return subkeys in any order.
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.
To enumerate subkeys, an application should initially call the RegEnumKey function with the dwIndex parameter set to zero. The application should then increment the dwIndex parameter and call the RegEnumKey function until there are no more subkeys (until the function returns ERROR_NO_MORE_ITEMS).
The application can also set dwIndex to the index of the last key on the first call to the function and decrement the index until the subkey with index 0 is enumerated. To retrieve the index of the last subkey, use the RegQueryInfoKey.
While an application is using the RegEnumKey function, it should not make calls to any registration functions that might change the key being queried.
The key identitied by the hKey parameter must have been opened with KEY_ENUMERATE_SUB_KEYS access (KEY_READ access includes KEY_ENUMERATE_SUB_KEYS access). To open the key, use the RegCreateKeyEx or RegOpenKeyEx function.
RegCloseKey, RegCreateKeyEx, RegDeleteKey, RegEnumKeyEx, RegOpenKeyEx, RegQueryInfoKey, RegQueryValue
file: /Techref/os/win/api/win32/func/src/f72_7.htm, 5KB, , updated: 2000/4/7 12:19, local time: 2024/8/23 00:13,
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