Function name: RegNotifyChangeKeyValue

Defined in : advapi32

Requirements : Windows NT 3.1 or later; Windows 98 or later

Declaration:

Declare Function RegNotifyChangeKeyValue Lib "advapi32.dll" Alias "RegNotifyChangeKeyValue" (ByVal hKey As Long, ByVal bWatchSubtree As Long, ByVal dwNotifyFilter As Long, ByVal hEvent As Long, ByVal fAsynchronus As Long) As Long

Parameters:

* hKey Identifies a currently open key or any of the following predefined reserved handle values: HKEY_CLASSES_ROOT HKEY_CURRENT_USER HKEY_LOCAL_MACHINE HKEY_USERS * bWatchSubtree Specifies a flag that indicates whether to report changes in the specified key and all of its subkeys or only in the specified key. If this parameter is TRUE, the function reports changes in the key and its subkeys. If the parameter is FALSE, the function reports changes only in the key. * dwNotifyFilter Specifies a set of flags that control which changes should be reported. This parameter can be a combination of the following values: REG_NOTIFY_CHANGE_NAME Notify the caller if a subkey is added or deleted. REG_NOTIFY_CHANGE_ATTRIBUTES Notify the caller of changes to the attributes of the key, such as the security descriptor information. REG_NOTIFY_CHANGE_LAST_SET Notify the caller of changes to a value of the key. This can include adding or deleting a value, or changing an existing value. REG_NOTIFY_CHANGE_SECURITY Notify the caller of changes to the security descriptor of the key. * hEvent Identifies an event. If the fAsynchronous parameter is TRUE, the function returns immediately and changes are reported by signaling this event. If fAsynchronous is FALSE, hEvent is ignored. * fAsynchronous Specifies a flag that indicates how the function reports changes. If this parameter is TRUE, the function returns immediately and reports changes by signaling the specified event. When this parameter is FALSE, the function does not return until a change has occurred. If hEvent does not specify a valid event, the fAsynchronous parameter cannot be TRUE.

Returns:

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.

Related functions:

Examples:

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