Available in LEADTOOLS Document and Medical Imaging toolkits.
The following classes are derived directly from LAnnotation:
LAnnAudioClip
LAnnAutomation
LAnnButton
LAnnContainer
LAnnEllipse
LAnnFreeHand
LAnnHilite
LAnnHotSpot
LAnnLine
LAnnNote
LAnnPointer
LAnnPolygon
LAnnPolyline
LAnnRectangle
LAnnRedact
LAnnRuler
LAnnStamp
LAnnText
LAnnPoint
LAnnVideo
