This interface is the principal means by which an embedded object provides basic functionality to and communicates with its container.
At a Glance
| Header file: | Oleidl.h |
| Windows CE versions: | 2.0 and later |
When to Implement
An object application must implement this interface, along with at least IDataObject and IPersistStorage, for each type of embedded object that it supports. Although this interface contains 21 methods, only three are nontrivial to implement and must be fully implemented: DoVerb, SetHostNames, and Close. Six of the methods provide optional functionality, which, if not desired, can be implemented to return E_NOTIMPL: SetExtent, InitFromData, GetClipboardData, SetColorScheme, SetMoniker, and GetMoniker. The latter two methods are useful mainly for enabling links to embedded objects.
When to Use
Call the methods of this interface to enable a container to communicate with an embedded object. A container must call DoVerb to activate an embedded object, SetHostNames to communicate the names of the container application and container document, and Close to move an object from a running to a loaded state. Calls to all other methods are optional.
| Method | Description |
| IOleObject::Advise | Establishes an advisory connection between an OLE object and the calling object’s advise sink, through which the calling object receives notification when the compound document object is renamed, save, or closed. |
| IOleObject::Close | Changes an embedded object from the running to the loaded state. It also disconnects a linked object from its link source. |
| IOleObject::DoVerb | Requests an object to perform an action in response to an end-user’s action. The possible actions are enumerated for the object in IOleObject::EnumVerbs. |
| IOleObject::EnumAdvise | Retrieves a pointer to an enumerator that can be used to enumerate the advisory connections registered for an object, so a container knows what to release prior to closing down. |
| IOleObject::EnumVerbs | Exposes a pull-down menu listing the verbs available for an object in ascending order by verb number. |
| IOleObject::GetClientSite | Obtains a pointer to an embedded object’s client site. |
| IOleObject::GetClipboardData | Retrieves a data object that contains the current contents of the embedded object on which this method is called. Using the pointer to this data object, it is possible to create a new embedded object with the same data as the original. |
| IOleObject::GetExtent | Retrieves a running object’s current display size. |
| IOleObject::GetMiscStatus | Returns a value that indicates the status of an object at creation and loading. |
| IOleObject::GetMoniker | Retrieves an embedded object’s moniker, which the caller can use to link to the object. |
| IOleObject::GetUserClassID | Returns the object class identifier (CLSID) corresponding to the string identifying the object to an end-user. |
| IOleObject::GetUserType | Retrieves the user type name of an object for display in user interface elements such as menus, list boxes, and dialog boxes. |
| IOleObject::InitFromData | Initializes a newly created object with data from a specified data object, which can reside either in the same container or on the clipboard. |
| IOleObject::IsUpToDate | Checks recursively whether or not an object is current. |
| IOleObject::SetClientSite | Informs an embedded object of its display location, called a “client site,” within its container. |
| IOleObject::SetColorScheme | Specifies the color palette that the object application should use when it edits the specified object. |
| IOleObject::SetExtent | Informs an object of how much display space its container has assigned it. |
| IOleObject::SetHostNames | Provides an object with the name of its container application and the compound document in which it is embedded. |
| IOleObject::SetMoniker | Notifies an object of its container’s moniker, the object’s own moniker relative to the container, or the object’s full moniker. |
| IOleObject::Unadvise | Deletes a previously established advisory connection. |
| IOleObject::Update | Updates an object handler’s or link object’s data to view caches. |