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IAdviseSink::OnViewChange

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This method advises the sink that an object has been closed.

void OnViewChange( 
  DWORD dwAspect, 
  LONG lindex
);

Parameters

  • dwAspect
    [in] Specifies the aspect, or view, of the object. Contains a value taken from the enumeration, DVASPECT.
  • lindex
    [in] Portion of the view that has changed. Currently only 1 is valid.

Return Values

None.

Remarks

Containers register to be notified when an object's view changes by calling IViewObject::SetAdvise. Once registered, the object will call the sink's OnViewChange method when appropriate. OnViewChange can be called when the object is in either the loaded or running state.

Even though DVASPECT values are individual flag bits, dwAspect may represent only one value. That is, dwAspect cannot contain the result of an OR operation combining two or more DVASPECT values.

The lindex member represents the part of the aspect that is of interest. The value of lindex depends on the value of dwAspect. If dwAspect is either DVASPECT_THUMBNAIL or DVASPECT_ICON, lindex is ignored. If dwAspect is DVASPECT_CONTENT, lindex must be 1, which indicates that the entire view is of interest and is the only value that is currently valid.

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

Requirements

OS Versions: Windows CE 2.0 and later.
Header: Objidl.h, Objidl.idl
Link Library: Oleaut32.lib, Uuid.lib.

See Also

IAdviseSink | DVASPECT | Determining Supported COM APIs | IViewObject::SetAdvise

Last updated on Wednesday, April 13, 2005

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