Annotation Functions:
Size, Position, and Shape
Using Window Coordinates to Select Objects
Selecting all objects in a rectangle:
LAnnContainer::SelectRect
LAnnContainer::GetSelectCount
LAnnContainer::GetSelectItems
Selecting an object at a particular point:
LAnnContainer::SelectPoint
Getting the bounding rectangle of selected objects:
LAnnContainer::GetSelectRect
Identifying an object at a particular point:
LAnnotation::SendToBack