Views can be assigned not only to the solid views that the user creates, but also to each sheet. The view assigned to a drawing sheet is called a background view. Function
ProDrawingViewIsBackground() determines whether the specified view is a background view.
If you use
ProSelect() for an item in a drawing that is not inside a solid view, such as a detail item, the
ProView view handle output by
ProSelectionViewGet() is the background view.