ArcObjects Library Reference (Display)  

esriBalloonCalloutStyle Constants

Balloon callout styles.

Constant Value Description
esriBCSRectangle 0 The balloon callout is a rectangle.
esriBCSRoundedRectangle 1 The balloon callout is a rounded rectangle.
esriBCSOval 2 The balloon callout is an oval.

Product Availability

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.