Keeps an embedded object's container running.
| BOOL fLock
||//Value indicating lock or unlock
[in] Specifies whether to lock (TRUE) or unlock (FALSE) a container.
Container was locked successfully.
An unspecified error occurred.
Container could not be locked due to lack of memory.
An embedded object
to keep its container running when the object has link clients that require an
update. If an end-user selects File Close from the container's menu, however,
the container ignores all outstanding LockContainer
locks and closes the document anyway.
Notes to Callers
When an embedded object changes from the loaded to the running state, it
should call IOleContainer::LockContainer
with the fLock
parameter set to TRUE. When the embedded object shuts down (transitions from
running to loaded), it should call IOleContainer::LockContainer
with the fLock
parameter set to FALSE.
Each call to LockContainer
set to TRUE must be balanced by a call to LockContainer
set to FALSE. Object applications typically need not call LockContainer
; the default handler makes these calls automatically for object applications
implemented as .EXEs as the object makes the transition to and from the running
state. Object applications not using the default handler, such as DLL object
applications, must make the calls directly.
An object should have no strong locks on it when it registers in the Running
Object Table, but it should be locked as soon as the first external client
connects to it. Therefore, following registration of the object in the Running
Object Table, object handlers and DLL object applications, as part of their
implementation of IRunnableObject::Run
, should call IOleContainer::LockContainer(
to lock the object.
Notes to Implementors
The container must keep track of whether and how many calls to LockContainer(
have been made. To increment or decrement the reference count, IOleContainer::LockContainer
with a flag set to match fLock
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