Available in LEADTOOLS Medical Imaging toolkits.
Dicom Annotations: Graphic Objects
LDicomDS::CreateGraphicObject
LDicomDS::GetGraphicObjectCount
LDicomDS::GetGraphicObjectInfo
LDicomDS::GetGraphicObjElement
LDicomDS::GetGraphicObjPointCount
LDicomDS::RemoveAllGraphicObjects
LDicomDS::SetGraphicObjectInfo