Internet-Aware
Objects
There are
certain categories identified to cover the persistency interfaces, these have
been identified as a result of defining how controls function across the
internet. A container that does not support the full range of persistency
interfaces should ensure that it does not host a control that requires a
combination of interfaces that it does not support. Details of the features
required for internet aware controls are available in the ActiveX SDK.
The following
tables describe the meaning for various categories as both implemented and
required categories.
|
Required
Categories |
Description |
|
CATID_PersistsToMoniker,
CATID_PersistsToStreamInit, CATID_PersisitsToStream, CATID_PersistsToStorage,
CATID_PersistsToMemory, CATID_PersistsToFile, CATID_PersistsToPropertyBag |
Each of
these categories are mutually exclusive and are only used when an object
supports only one persistence mechanism at all (hence the mutual exclusion).
Containers that do not support the persistence mechanism described by one of
these categories should prevent themselves from creating any objects of
classes so marked. |
|
CATID_RequiresDataPathHost |
The object
requires the ability to save data to one or more paths and requires container
involvement, therefore requiring container support for IBindHost. |
|
Implemented
Categories |
Description |
|
CATID_PersistsToMoniker,
CATID_PersistsToStreamInit, CATID_PersistsToStream, CATID_PersistsToStorage,
CATID_PersistsToMemory, CATID_PersistsToFile, CATID_PersistsToPropertyBag |
Object
supports the corresponding IPersist* mechanism for the category. |
The following
table provides the exact CATIDs assigned to each category:
|
Category |
CATID |
|
CATID_RequiresDataPathHost |
0de86a50-2baa-11cf-a229-00aa003d7352 |
|
|
|
|
CATID_PersistsToMoniker
|
0de86a51-2baa-11cf-a229-00aa003d7352 |
|
CATID_PersistsToStorage
|
0de86a52-2baa-11cf-a229-00aa003d7352 |
|
CATID_PersistsToStreamInit
|
0de86a53-2baa-11cf-a229-00aa003d7352 |
|
CATID_PersistsToStream
|
0de86a54-2baa-11cf-a229-00aa003d7352 |
|
CATID_PersistsToMemory
|
0de86a55-2baa-11cf-a229-00aa003d7352 |
|
CATID_PersistsToFile
|
0de86a56-2baa-11cf-a229-00aa003d7352 |
|
CATID_PersistsToPropertyBag |
0de86a57-2baa-11cf-a229-00aa003d7352 |