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