IRunningObjectTable::GetTimeOfLastChange

發行項
11/18/2015

A version of this page is also available for

4/8/2010

This method returns the time that an object was last modified. The object must have previously been registered with the Running Object Table (ROT). This method looks for the last change time recorded in the ROT.

Syntax

HRESULT GetTimeOfLastChange(
  IMoniker* pmkObjectName,
  FILETIME* pfiletime 
);

Parameters

pmkObjectName
[in] Pointer to the IMoniker interface on the moniker to search for in the ROT.

pfiletime
[out] Pointer to a FILETIME structure that receives the object's last change time.

Return Value

S_OK
The last change time was successfully retrieved.

S_FALSE
There is no entry for pmkObjectName in the ROT, or that the object it identifies is no longer running (in which case, the entry is revoked).

Remarks

This method returns the change time that was last reported for this object by a call to IRunningObjectTable::NoteChangeTime. If IRunningObjectTable::NoteChangeTime has not been called previously, the method returns the time that was recorded when the object was registered.

This method is provided to enable checking whether a connection between two objects (represented by one object holding a moniker that identifies the other) is up-to-date.

For example, if one object is holding cached information about the other object, this method can be used to check whether the object has been modified since the cache was last updated. See IMoniker::GetTimeOfLastChange.

To determine whether the platform supports this interface, see Determining Supported COM APIs.

Notes to Callers

Generally, you call IRunningObjectTable::GetTimeOfLastChange only if you are writing your own moniker class (that is, implementing the IMoniker interface).

You typically call this method from your implementation of IMoniker::GetTimeOfLastChange.

However, you should do so only if the pmkToLeft parameter of IMoniker::GetTimeOfLastChange is NULL. Otherwise, you should call IMoniker::GetTimeOfLastChange on your pmkToLeft parameter instead.

Requirements

Header	objidl.h, objidl.idl
Library	ole32.lib, uuid.lib
Windows Embedded CE	Windows CE 3.0 and later
Windows Mobile	Windows Mobile Version 5.0 and later

共用方式為