The method has the following four parameters:
aUser
The name of the user.
aKey
The attribute key.
aValue
On return, this location contains a pointer to the retrieved attribute value.
aReturnCode
On return, contains a constant that determines whether the server should continue with the default, or with the override processing.
One of the following constants:
NS_CONTINUE_DEFAULT_PROCESSING
NS_OVERRIDE_DEFAULT_PROCESSING