PRB: GetData Returns Outdated Data for OLE 1.0 Object

• Microsoft OLE Libraries for Windows and Win32s, version 2.01
• Microsoft OLE Libraries, included with:

      - Microsoft Windows NT, versions 3.5 and 3.51
      - Microsoft Windows 95
  

SYMPTOMS

If an OLE 2.0 container application document contains an embedded OLE 1.0 object, and the container calls IDataObject::GetData() to retrieve data for that object, the data returned is out of date, and does not reflect the OLE 1.0 server's most recent changes to the object.

CAUSE

OLE 1.0 embedded object servers only update the cache when the user chooses the Update command from the File menu. OLE 1.0 objects do not update the cache for every change to the object. Therefore, an OLE 1.0 object's cache often contains outdated data.

RESOLUTION

The container can obtain the latest object data by calling IOleObject::Update(). This function ensures that any data or view caches maintained inside the object are up to date.

REFERENCES

For more information on known idiosyncrasies of embedding OLE 1.0 objects into OLE 2.0 containers, see "Working with OLE 1 Servers" in the OLE Software Development Kit (SDK) version 2.01 Programmer's Reference.