The IViewObject2 interface is an extension to the IViewObject interface which returns the size of the drawing for a given view of an object. You can prevent the object from being run if it isn't already running by calling this method instead of IOleObject::GetExtent.
Like the IViewObject interface, IViewObject2 cannot be marshaled to another process. This is because device contexts are only effective in the context of one process.
The OLE-provided default implementation provides the size of the object in the cache.
Object handlers and in-process servers that manage their own presentations implement IViewObject2 for use by compound document containers.
A container application or object handler calls the GetExtent method in the IViewObject2 interface to get the object's size from its cache.
| IUnknown Methods | Description |
|---|---|
| QueryInterface | Returns pointers to supported interfaces. |
| AddRef | Increments reference count. |
| Release | Decrements reference count. |
| IViewObject Methods | Description |
|---|---|
| Draw | Draws a representation of the object onto a device context. |
| GetColorSet | Returns the logical palette the object uses for drawing. |
| Freeze | Freezes the drawn representation of an object so it will not change until a subsequent Unfreeze. |
| Unfreeze | Unfreezes the drawn representation of an object. |
| SetAdvise | Sets up a connection between the view object and an advise sink so that the advise sink can receive notifications of changes in the view object. |
| GetAdvise | Returns the information on the most recent SetAdvise. |
| IViewObject2 Method | Description |
|---|---|
| GetExtent | Returns the size of the view object from the cache. |
Windows NT: Use version 3.1 or later.
Windows: Use Windows 95 or later.
Windows CE: Unsupported.
Header: Declared in oleidl.h.