function Leadtools.Annotations.Core.AnnLabel()
Each LEADTOOLS annotation object has one or more AnnLabels associated with it. The number and the way the labes are used depend on which type of annotation object the annotation object is.
Use the AnnObject.Labels property to control the display of the labels for an AnnObject. Access each label by its name.
For example, to display the name of an AnnObject, set the AnnObject.Labels["AnnObjectName"].IsVisible property to true.
To hide the length of an AnnPolyRulerObject, set the AnnObject.Labels["RulerLength"].IsVisible property to false.