Causes the container to end the in-place session, deactivates the object, and
revert to its own saved undo state.
The method completed successfully.
An unexpected error occurred.
Notes to Callers
Called by the active object when the user invokes undo just after activating
Notes to Implementors
Upon completion of this call, the container should call IOleInPlaceObject::UIDeactivate
to remove the user interface for the object, activate itself, and undo.
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