interface manages access to the Running Object Table (ROT), a globally
accessible lookup table on each workstation. A workstation's ROT keeps track of those
objects that can be identified by a moniker and that are currently running on
the workstation. When a client tries to bind a moniker to an object, the
moniker checks the ROT to see if the object is already running; this allows the
moniker to bind to the current instance instead of loading a new one.
The ROT contains entries of the form:
element is a pointer to the moniker that identifies the running object. The pUnkObject
element is a pointer to the running object itself. During the binding
process, monikers consult the pmkObjectName
entries in the Running Object Table to see if an object is already running.
Objects that can be named by monikers must be registered with the ROT when
they are loaded and their registration must be revoked when they are no longer
When to Implement
You do not need to implement this interface. The system provides an
implementation of the Running Object Table that is suitable for all situations.
When to Use
You typically use the ROT if you're a moniker provider (that is, you hand out
monikers identifying your objects to make them accessible to others) or if
you're writing your own moniker class (that is, implementing the IMoniker
If you are a moniker provider, you register your objects with the ROT when
they begin running and revoke their registrations when they are no longer running.
This enables the monikers that you hand out to be bound to running objects.
You should also use the ROT to record the object's last modification time. You
can get an IRunningObjectTable
interface pointer to the local ROT by calling the GetRunningObjectTable
The most common type of moniker provider is a compound-document link source.
This includes server applications that support linking to their documents (or
portions of a document) and container applications that support linking to
embeddings within their documents. Server applications that do not support linking
can also use the ROT to cooperate with container applications that support
linking to embeddings.
If you are writing your own moniker class, you use the ROT to determine
whether a object is running and to retrieve the object's last modification time. You
can get an IRunningObjectTable
interface pointer to the local ROT by calling the IBindCtx::GetRunningObjectTable
method on the bind context for the current binding operation. Moniker
implementations should always use the bind context to acquire a pointer to the ROT;
this allows future implementations of IBindCtx
to modify binding behavior. Note that you must also implement the IROTData
interface on your moniker class in order to allow your monikers to be
registered with the ROT.
Methods in VTable Order
|Registers an object with the ROT.
|Revokes an object's registration with the ROT.
|Checks whether an object is running.
|Returns a pointer to an object given its moniker.
|Notifies the ROT that an object has changed.
|Returns the time an object was last changed.
|Returns an enumerator for the ROT.
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